Several minutes has passed from that attack and Cael notice the area was starting to look a bit messier. In the distance, Paz and Cael spotted the wreckage of an old logistics truck.
The lorry was not something either of them had expected. The vehicle's chassis was recognisable. The cab was there, tilted at the angle of a vehicle that had come to rest in a hurry and stayed there. The trailer was intact, the rear doors hanging open at a fifteen-degree list that was the hollow's doing rather than the driver's.
It sat in a pocket of relatively stable geometry at what the navigation unit's failing data suggested was the sector's third-quarter depth. The amber glow of the surrounding walls passed through the open trailer doors and lit the interior in long, flat planes.
Cael stopped at the edge of the pocket and read it.
"So that's the courier's vehicle," Paz said.
"Seems so."
"We actually have people who's crazy enough to drive in here."
"The Fixer mention the previous client was using the hollow as a transit corridor." He looked at the chassis. "This isn't the first run they made through here."
"How do you know?"
"The tyre wear on the near-side rear. What's left of it. The hollow's done something to the rubber but the pattern's still there. This vehicle has covered significant distance."
Paz looked at the tyre. Then at him. The mask did the thing it did.
"You noticed the tyre pattern."
"I also notice things as well."
She made the sound that might have been a short laugh and moved toward the trailer.
He moved toward it too. They reached the doors at the same time, which produced a brief geometrical dispute at the threshold that neither of them acknowledged, and then they were inside.
The trailer was a science project wearing a shipping container's clothes.
Both of them stood in the doorway for a moment and took it in.
"What in the hell?" Cael said.
The trailer had been fitted out as a mobile logistics space. Shelving ran both walls, secured with industrial ratchet straps. Most shelves held anonymous cargo: sealed crates, components with obscured markings, water-sealed equipment containers. Standard smuggling inventory.
Along the left wall, secured to a modified racking system that had been bolted directly through the trailer's original lining, were three rows of equipment cases in various states of being either sealed, open, or in the process of being repacked when whoever had packed them had stopped. Monitoring equipment. Portable containment units of the kind Cael associated with HIA hazardous-material recovery teams. Two devices that he did not have a name for and which had the particular look of something that had been custom-fabricated for a specific purpose rather than manufactured for general use.
On the right wall, clamped to a folding work surface, were instruments. Some of them he recognised from outer ring contractor supply catalogues. Most of them he didn't. They had the experimental quality that came from someone who knew what the standard tools could and couldn't do and had built alternatives for the couldn't.
But in the middle section, on a workbench bolted to the floor with the thoroughness of someone who expected significant vibration, was a setup that did not make sense for a smuggling operation.
Twelve containment units in a row, each the size of a shoebox, sealed with biometric locks that had long since lost power. Wiring harnesses connecting them in a loop pattern that suggested they had been running collectively. A monitoring station with a dead screen, cables still connected to the units, with handwritten labels on the bezel: STABILITY CHECK. RESONANCE THRESHOLD. OUTPUT GATE — CONFIRM BEFORE OPENING.
"Yep, this is a smuggling trailer alright," Paz said, moving into the space. "This wasn't a one-time job. Who builds infrastructure for running cargo through a hollow?"
"Someone who's been doing it long enough to optimise for it." He moved along the left wall, reading the cases. Most were locked. One wasn't. He opened it and found field sampling equipment for Ethereal matter: probes, collection vessels, analysis strips in sealed packaging. "And someone who was interested in the hollow itself. Not just using it as a route."
Paz had reached the far end of the trailer. She stopped.
"Cael."
He heard the tone. He closed the sampling case and went to look.
The briefcase was secured to the trailer's rear bulkhead by two heavy-duty straps that had been attached to purpose-made anchor points, not retrofit, not improvised, anchor points that had been welded into the bulkhead before the trailer was used for any of this. Someone had planned for the case to be transported somewhere. Someone had planned for it to stay.
It was roughly the dimensions of a large document case, matte black, with an electronic seal that had been fused in the closed position. Not locked. Fused. The difference being that a locked seal was meant to be opened later and a fused seal was meant to be permanent. It has a label which says:
'WARNING — PRIORITY ITEM IS TO BE SECURE AT ALL TIMES! UNAUTHORISED OPENING WILL SUBJECT OFFENDER TO IMMEDIATE TERMINATION.'
The case hummed. Low. Below audible. The kind you felt in the bones of your forearm when you stood close to it.
"Is that's it?" Paz said.
Cael used his wrist tablet to scanned the item, it took a while before the display flashes in confirmation see the signature of matches title he ones the Fixer remotely updated before entering the hollow.
Cael smiles. "Yes."
"It's fused."
"Well, at least the engine is secure."
He crouched and looked at it. The hum had a quality he hadn't encountered before — not the steady single-note hum of a standard W-engine in storage, but something layered, almost harmonic, like two frequencies running close enough together that they produced a third tone between them.
The casing had marks on it.
He leaned closer. The marks were not damage. They were not the crystalline encroachment of Ethereal matter that the original commission briefing had mentioned. They were something else: a surface texture that ran against the grain of the case's manufacturing, as if the metal itself had partially changed its mind about what it was.
Corrupted. Except it's not. The hum is wrong for corrupted. Corrupted W-engines don't produce harmonics, they produce interference. This is—
"Don't touch it," Paz said.
He touched it.
Nothing happened for exactly one second.
Then the hum ran up his arm from his fingertips to his shoulder in a single wave that felt like nothing he had a word for — not pain, not electricity, not the Attribute-burn of hollow contact, but something in the family of all three that was somehow worse for being unclassifiable. He yanked his hand back.
"I said don't—"
"I heard you."
"And?"
"And I made a different decision."
"And?"
He held up his hand. All fingers present, no visible damage, sensation returning at a normal rate.
"It's safe to touch," he said. "It's just extremely unpleasant."
"Those are meaningfully different conditions."
"Yes. Worth knowing which one applies."
She stared at him or did the mask equivalent, which he was increasingly able to distinguish from actual staring and he stared back, and then without discussing it they both reached for the anchor straps at the same time and started working the case free.
The straps came loose in stages. The case was heavier than it looked. They got it off the bulkhead between them, two people who had not agreed to cooperate on this and were doing it anyway because the alternative was one of them trying to manage it alone and the geometry of the trailer not accommodating that.
Cael took the handle.
The hum ran through the handle into his palm. Unpleasant, as established.
The moment his hands took the full weight, the crystalline growth on the engine's housing pulsed once, a sharp, bright, the light hitting the trailer interior in a hard geometric flash.
He dropped it on pure reflex.
Paz caught it.
The growth pulsed again, brighter, and she dropped it on pure reflex.
It hit the trailer floor. The pulse intensified, the fractured light patterns cycling faster, the erratic rhythm accelerating into something that looked uncomfortably like a warning.
"Pick it up," Paz said.
"You pick it up."
"I just dropped it!"
"So did I!"
He managed three steps before the trailer shifted.
Not a hollow shift. The trailer itself. The chassis settling in the pocket geometry, a slow lurch that translated through the floor as a rolling drop of about fifteen degrees to port, fast enough that neither of them had time to brace and slow enough that there was a distinct moment in the middle where Cael could feel the exact mechanics of what was happening and still not stop it.
The case rolled along trailer floor and towards one of the clusters of machinery .
Paz caught it.
The hum ran through her and she made a sound that was not any of the sounds he'd heard from her yet, sharp, involuntary, the sound of someone who had just touched something cold and wrong and she shoved it back toward him on pure reflex.
Cael caught it. The hum ran through him again.
"Take it," he said, passing it back.
"I don't want it." Paz said passing it back
"Neither do I, but one of us has to hold it."
"You hold it. You're the one who touched it first."
"That's not how—"
The trailer lurched again, shorter this time, and the case went between them in a brief and undignified transfer that involved Cael's elbow, Paz's forearm, and a half-second where both of them had one hand on the handle simultaneously and were both vibrating at low frequency like a tuning fork someone had struck twice.
Cael and the transit case lurched in the same direction.
The engine pulsed hard.
Paz grabbed the case from the other side on pure instinct.
Cael grabbed it back on the same instinct.
The engine flared between their competing grips, the light patterns spiking —
"STOP—"
"LET GO—"
"YOU LET GO—"
They were both holding the case. The engine cycling between them. The trailer settling into its new two-degree tilt.
Then the engine's pulse slowed. Steadied. Returned to its erratic but non-escalating baseline.
They both exhaled.
"Stop," Paz said. She was holding it at arm's length with the expression, or the mask equivalent of someone performing a task they had entirely not signed up for. "Get the briefcase open. Properly. Before we try to move this through an active hollow geometry while playing— whatever this is."
"If the case is causing this much issue then god help us if the engine is any worse."
"Just do it!"
"Alright!"
He found a collapsible tool set in one of the open equipment cases along the wall and spent ninety seconds locating the fused seal's override points, which the custom fabricator had hidden under a secondary plate because of course they had, and another sixty working the plate off with a tension tool not designed for that purpose. The seal released with a sound like a small pressure vessel equalising.
He opened the case.
The engine was there. S-rank, exactly as described, the iridescence of a fully charged unit visible even in the hollow's amber light. It sat in a custom-formed housing that had been moulded to fit it precisely.
And it was wrong.
Not corrupted. He'd been right about that. The engine was functional, the charge was intact, and the standard indicators showed clean. But the surface of the unit had the same grain-against-manufacturing texture as the case itself, the same partial-change-of-mind quality, as if it had been exposed to something that was not quite hollow energy and not quite anything else and had adapted to it in a way that no W-engine in any product specification he'd ever read was supposed to be capable of.
Then the engine's pulse slowed. Steadied. Returned to its erratic but non-escalating baseline. Cael reaches to grabbed the handle but more cautiously, tapping lightly at the handle bar before grabbing it as he felt not sharp vibration.
They both exhaled.
"Okay," Cael said.
"Okay," Paz agreed. "That's not a standard S-rank, isn't it?"
"No."
"What did they do to it?"
"I don't know." He closed the case and sealed it again, not fused, just latched. "Probably above our pay grade."
She was quiet for a moment.
"We're taking it anyway."
"We're taking it anyway." They both said at the same time.
"Because the Fixer is paying us." Paz said
"That's one reason."
"What's the other?"
The hum ran through the handle, unpleasant and layered and considerably more interesting than it had been two minutes ago.
"I want to know what they did to it."
She stared at him.
"That's still a terrible reason," she said.
"Still want to know."
She reached for the case.
He moved it.
Not far. Just out of reach. A small, precise movement that kept the case on his side of the available space.
"Hey! That was stupid," he said.
"We both found it."
"I found it first."
"We found it together."
"I was ahead."
"You were in a narrow corridor so you had to be. That doesn't count as finding it first."
"I touched it first."
"That was a mistake, not a claim."
He held the case. She was looking at it. The quality of her attention had the specific character of someone who was deciding whether a disagreement was worth escalating, which he was familiar with because he was conducting the same internal assessment.
"Give me the case, Cael."
"No."
"Split the commission means split the deliverable—"
"Split the commission means split the payment when we hand it over, not—"
"How do I know you'll hand it over? How do I know you won't take it straight to the client and cut me out?"
"I can say the same for you."
Paz hand moved to her sword.
Cael hand also moved to his revolver.
Both of them stopped.
A beat of silence. Long enough to hear the hollow breathing around them and the low, layered hum of the case in his hand and the fact that they were both about to make a second extraordinary poor decision in a single hollow run.
"Eight people didn't come back from this sector. We're in it. We have the objective. We are about to fight each other over which of us gets to carry it out." Cael said coldly
He watched the same calculation cross whatever was happening behind the mask.
Her hand left the sword.
His hand left the revolver.
"I carry it to the handoff," he said. "Commission splits even. You verify with George."
"Who?"
"The one of the Bangboo staff…"
"Fine… I verify with George and once the Fixer confirms the split before the engine leaves the shop," she said. "We can get on with our lives."
"Agreed."
Neither of them moved for another second, the way you didn't move when an agreement had just been reached by two people who weren't entirely sure they trusted the other one to keep it.
Then, from outside the trailer, they heard something.
* * *
They were two metres from the trailer door, moving carefully, the case between them on the cord, when they both heard it.
It was not a hollow sound.
Hollow sounds were the ambient register of the space with the low hum of Ethereal matter, the crystalline shift of geometry in motion, the subsonic breath of a place that was not alive but was doing something in the vicinity of alive.
This was different.
This was the sound of a fission opening, then there was radio chatter. Short bursts. Filtered. The specific clipped quality of a secure frequency where everyone talking already knew most of what needed to be said and was only transmitting the parts that were new.
Cael and Paz looked at each other and he took cover behind a fallen building debris, case in hand, and stayed inside the frame where the angle kept them out of sightlines. Paz was beside him in two steps, sword back in its carry, both of them listening.
The chatter was coming from the direction of the sector approach, the way they'd come in. Multiple sources. Cael counted three distinct transmission signatures by pitch and modulation, which meant at least three people and possibly more running radio discipline that was better than outer ring contractor standard.
He caught fragments.
"...grid confirms the pocket. Vehicle's still in the original position..."
"...Priority item status?"
"...Unclear. Interference from the Ethereal density is—... suggest visual confirmation before..."
"...Priority team to the vehicle. Non-essential personnel hold the sector entrance..."
Paz peaked briefly before hastily duck back. Paz's mouth was close to his ear. Close enough that he could feel the warmth of it through the mask's side seal.
"HMB," she said. Barely breath.
"What?"
"Their badge…"
He'd already seen it. One of the approaching figures had moved into a line of amber glow from the hollow's walls, and the gear was wrong for a contractor, it was too uniform, too matched, equipment that had been issued rather than accumulated, and on the shoulder of the jacket, plain and institutional, was a badge he'd seen on boundary perimeter technicians and enforcement units and none of the people he'd expected to find in the third sector of an unstable deep hollow.
Hollow Management Bureau.
Not perimeter staff. Perimeter staff didn't run six-person recovery teams into sector-three geometry with a radio protocol that clean.
"They knew the vehicle was here," Paz said.
"They knew the engine was here," he corrected quietly. "Priority item. That's not a vehicle."
"Then why haven't they been in already?"
"The geometry." He looked at the case in his hand. "They've been waiting for the geometry window."
"Which is now?"
"Which is now..."
She looked at the approaching team. He looked at the trailer. He looked at the distance between the trailer and the sector exit route, which was on the other side of the approaching team, which was the kind of geometric problem that had exactly one viable solution.
"Other exit," he said.
"There isn't one."
"The hollow is churning. The wall configuration from fifteen minutes ago isn't the wall configuration now."
"You want to navigate a live-churning sector with no Carrot data and a team of HMB enforcement between us and the known exit. Are you crazy?"
"I'm not willing to hand this case to an HMB Tactical team when I have a commission from a client who specifically went outside official channels to recover it. Plus, they'll kill us the first chance they get. I ain't going to be the tenth Courier missing, not today… "
She processed that for exactly two seconds.
"Fine… Lead," she said.
They moved.
Out of the trailer on the blind side, which was the side away from the approach angle, which gave them three seconds before any of the approaching team would have a sightline on the trailer's exit. Three seconds in a churning hollow sector was enough to put one geometry shift between them and the team, which was either sufficient or wasn't and they would find out which in approximately two minutes.
The wall to their left was where a wall had not been twenty minutes ago.
The corridor that had been to their right was gone.
Ahead of them was something that was approximately a passage, running at an angle that didn't correspond to any geometry they'd moved through on the way in, in a direction that his failing navigation unit was struggling to resolve against what remained of its Carrot data.
"That way," Cael said.
"You don't know what's that way."
"It's away from the HMB team."
They went.
Behind them, one of the HMB agents had reached the trailer. He heard the footstep on the trailer floor through the hollow's particular acoustic qualities, clear and precise, the sound of someone who had just entered a space that two people had just left.
Then a different sound.
Sharp. Electronic. The triggered-sensor note of something that had been waiting and had just stopped waiting.
A line of red laser light cut across the hollow's amber from behind them, moving in a horizontal sweep at shoulder height. An old defensive sensor, the kind that couriers running contraband routes installed on their loading points and left active on a passive trigger so that anyone who found the vehicle without the override code became immediately identifiable and immediately a problem.
The laser swept across Cael's back.
It swept across Paz.
It did not care that they were trying to leave. It had its instructions from before the courier stopped coming back, and its instructions were to mark and alert.
"Run," Paz said. "RUN!"
They ran.
Behind them, in the amber hollow light, the HMB team's radio chatter changed character entirely. The clipped professional fragments resolved into something shorter and more urgent, the kind of transmission that preceded an action rather than a report.
Then a voice, not on radio but in the hollow itself, carrying through the Ethereal matter's particular acoustic:
"Contact! Two runners, priority item in hand — all units, intercept them!"
Then the crack of gunfire.
The rounds came in short, controlled bursts, not suppression, not panic fire, but the precise covering fire of trained personnel who were attempting to stop two people from leaving with something that mattered.
The geometry of the hollow did what hollow geometry did with sound: absorbed some of it, reflected the rest, and returned it at angles that made it impossible to locate the shooter precisely.
But the rounds were hitting wall close enough to feel.
Cael ran, case in one hand and the hollow's layout assembling itself from fragments in his mind, not the Carrot data, which was gone, but the observations he'd been making since they crossed the boundary, the patterns of the churning geometry, the directions the walls had been moving in and what they implied about where the sector's structure was trying to go.
Paz was beside him, not behind, not ahead, matching his pace with the specific economy of someone who had decided that coordinated flight was worth the implicit admission that they were doing this together.
Another burst of fire. Closer.
The HMB agents came around both sides of the lorry at exactly the same time.
"THERE!"
"RAIDERS, HALT!"
BANG! BANG! BANG!
Cael fired three rounds, hitting the agents accurately, throwing off their aim but he never wanted to know if he kill one, that wasn't his problem.
Paz ran hard beside him, matching his pace. The case was in his hand and it buzzed against his palm and the hollow churned around them with its irregular, maddening logic, and somewhere behind the sealed passage the HMB team was still moving and still talking on their radio and still entirely too close.
Suddenly, a Fission appeared in front of them. A passage that shouldn't have been there was.
He went through it. She went through it. The hollow sealed behind them with the slow, crystalline inevitability of a space that had decided something, and whether it had decided to help them or simply hadn't distinguished between helping and obstructing was a question for later.
The gunfire stopped.
The silence was not reassuring. Silence after gunfire in a hollow meant repositioning, not retreat.
Paz's breathing was controlled beside him. Working breathing, not panicked. The breathing of someone who had been in worse than this and had a method for it.
"Are we clear?" Paz asked.
Cael was still panting, trying to recover his breath. he has millions of questions of what had unfolded, but that doesn't matter now.
Suddenly, the navigation data cracked to life. New carrot data has been received.
"We made it…" Cael said quietly.
He almost laughed.
Paz's navigation data also cracked to life.
"WE MADE IT!"