Kael ran.
Not because he trusted Renn. Not because he feared the boy.
Because the sound above them was wrong.
Clicks layered over clicks, hundreds of them bouncing off concrete and glassless windows. Fast. Organized. Moving in waves through the dark. Dust rained from ledges as shapes shifted overhead.
Renn was already sprinting down the alley, bare feet slapping wet pavement. "Left!" he shouted.
Kael didn't ask why. He cut left around a collapsed vending machine just as something dropped where he'd been.
It hit hard enough to crack the ground.
Pale limbs unfolded from a crouch. Too many joints. Skin stretched thin over ribs that moved like breathing knives. No eyes, only a cluster of twitching pits where a face should be.
The thing snapped its head toward him.
Kael buried the broken knife in one of the pits and shoved past it.
It shrieked, high and metallic.
Then the alley erupted.
Three more spilled from the walls. One leapt from a fire escape, another crawled upside down along brick, nails screeching sparks. Renn vaulted a rusted dumpster and kept moving.
"Do they ever stop talking?" he yelled.
Kael nearly laughed despite himself.
A claw grazed his shoulder. Heat flared. He spun, seized the creature's wrist, and used its momentum to slam it into a wall. The impact stunned it for half a breath. Enough time to stomp its knee sideways.
Bone snapped.
It lunged anyway.
Kael ducked, drove his elbow under its jaw, then shoved it into the path of another. Both tangled together in a knot of screeching limbs.
He ran again.
The pain in his joints returned with every stride. Something inside his legs felt too tight, as if new cords had been threaded through old muscle.
Renn cut through a doorway into an abandoned market.
Shelves lay overturned. Rotten packaging burst underfoot. The air stank of mildew and old grease.
"Back exit!"
Kael followed, hearing the swarm crash in behind them. Shelves toppled. Glass burst. The creatures moved with manic hunger, throwing themselves through obstacles rather than around them.
Renn slid across a counter and kicked through a rear service door. Cold night air slapped them both.
Outside waited a narrow service lane ending at a chain-link fence.
Kael slowed. "Dead end."
Renn grinned over his shoulder. "Only if you're ordinary."
He leapt, caught the top of the fence, and scaled it like gravity had loosened its grip.
Kael cursed and jumped after him.
Hands caught wire. Pain bit his palms. He hauled himself upward as the first creature reached his ankle.
Its grip was ice-cold.
He kicked downward hard enough to feel teeth break, then dragged himself over and dropped to the other side.
Renn was already moving again.
Behind them, the fence shook violently. Metal screamed as claws tore through it.
"Why are they chasing us?" Kael said.
Renn didn't look back. "Because you cut one."
"That's stupid."
"They're stupid in groups. Smart alone."
"That makes no sense."
"Welcome to District Seven."
They crossed into a wider street where old tram tracks split the pavement. Moonlight silvered the broken rails. Buildings loomed on either side like hollow teeth.
Renn finally slowed near an overturned bus lying on its side.
"Inside."
Kael hesitated.
Renn pointed upward.
The clicking had spread out, circling, searching. None of the creatures dropped into the street.
Kael ducked into the bus.
Seats hung from torn bolts. Windows were gone. The smell inside was rust, mold, and old rainwater. Better than outside.
Renn crouched near the far end and listened through the metal shell.
For a minute, neither spoke.
Kael checked the wound on his shoulder. Three shallow lines. Bleeding, but not badly.
Renn noticed. "Lucky."
"You sound disappointed."
"I'm practical."
Kael sat opposite him. The boy looked younger in stillness. Hollow cheeks, narrow wrists, old scars crossing both forearms. Not soft. Just unfinished.
"How long have you been here?" Kael asked.
Renn shrugged. "Long enough to stop counting."
"You survive by eating corpses?"
"I survive by staying alive." Renn tilted his head. "You still thinking like the upper districts?"
Kael said nothing.
Renn snorted. "That means yes."
There was no point denying it. Even the lowest blocks outside the walls had rules. Ugly ones, but rules. Here, morality looked thin.
"You knew I changed," Kael said. "How?"
"I smelled it."
Kael frowned.
Renn tapped his own nose. "Not literally. Sort of. Hard to explain. When people awaken something useful, the air around them shifts."
"That sounds insane."
"It is insane." Renn smiled without humor. "You'll get used to it."
Kael watched him a moment. "You've changed too."
The smile vanished.
"Everyone here changes."
Outside, claws scraped across the bus roof. Slow. Testing.
Both of them froze.
The metal bowed inward with a heavy thump.
Another.
Dust sifted from seams.
Renn's voice dropped to a whisper. "Don't move."
A shadow crossed one shattered window. Larger than the others. The bus creaked as weight shifted overhead.
Kael gripped the broken knife.
The thing sniffed through the openings, wet and deliberate.
Then a second sound rolled down the street.
Deep.
A bass vibration more felt than heard.
Every scrape above them stopped.
The roof weight lifted instantly.
Clicks erupted in panic, retreating fast across walls and rooftops.
Renn's face had gone pale.
"What was that?" Kael whispered.
Renn didn't answer at first.
He listened until the last of the swarm faded.
Then he said, "Something that eats nests."
They waited another ten minutes before climbing out.
The street felt emptier now, as if even the wind had decided to leave.
Renn moved quicker than before, eyes scanning every intersection. The cocky edge had drained out of him.
"You know where we're going?" Kael asked.
"Somewhere with doors."
"Comforting."
"You complain a lot for someone alive one day."
Kael almost replied, then caught movement in a storefront reflection.
He spun.
Nothing there.
But his pulse had already surged.
Predatory Hunger stirred inside his chest, a low pressure behind the ribs. It reacted to fear, to blood, to movement. Like another animal pacing inside him.
Renn noticed the pause. "You feel it?"
Kael looked at him sharply.
"The pull," Renn said. "After your first intake."
"You know too much."
"I know enough." He kept walking. "If you ignore it too long, it gets louder."
Kael's silence was answer enough.
Renn glanced back. "What did you absorb?"
"A man."
Renn barked a laugh. "Rough start."
"It wasn't planned."
"It never is."
They reached a narrow building wedged between two collapsed towers. A faded sign hung above the door: Municipal Records Archive.
Renn shoved inward.
The lobby beyond was dark except for a lantern burning on a desk made from stacked filing cabinets.
Kael stopped.
They weren't alone.
Three people rose from the shadows.
A broad woman with a shaved scalp held a machete with butcher's familiarity. A thin older man aimed a nailgun assembled from scavenged parts. Near the stairs stood a girl wrapped in layered coats, one hand hidden inside a pocket.
Nobody looked surprised to see Renn.
The woman looked annoyed.
"You're late."
"I brought company," Renn said.
"I can count."
Her eyes fixed on Kael. Assessing weight, posture, injuries, threat. "New drop?"
"Yes."
"Useful?"
"Maybe."
Kael met her stare. "You always greet strangers with weapons?"
She shrugged. "The polite ones die first."
Renn grinned. "Kael, this is Mara. She thinks she's in charge."
"I am in charge."
"See?"
The older man didn't lower the nailgun. "He armed?"
"Knife," Renn said.
"Then he's optimistic."
The girl by the stairs still hadn't moved.
Kael noticed she was younger than Renn, maybe fifteen. Her hidden hand never shifted in the pocket.
Mara jerked her chin toward the desk. "Sit. If you fall over, do it away from the lantern."
Kael remained standing. "Why help me?"
"Didn't say we were helping." Mara wiped the machete clean with a cloth. "Renn likes strays."
Renn leaned against a cabinet. "Sometimes they bite back."
"Sometimes they scream and slow us down."
Her gaze slid to Kael's shoulder wound. "Nest runner got you. Clean it or lose the arm."
Kael didn't move.
Mara's mouth twitched. "Stubborn too."
The older man finally spoke again. "Name's Dren. Girl there is Sera. If you steal, I pin you to the wall."
Sera gave a tiny nod, eyes unreadable.
Kael took a seat on an overturned crate.
The room was warmer than outside. Not warm enough to relax, but enough that fatigue found him all at once. His muscles trembled under the surface. Hunger pressed harder now that danger had paused.
Mara saw it.
"You've fed already."
Kael looked up.
She tapped her own chest. "That look. Half-sick, half-hungry."
Renn muttered, "Told you."
Mara's expression sharpened. "What did he take?"
"Human," Renn said.
The room changed.
Small shifts. Dren tightened his grip. Sera's hidden hand moved deeper into her pocket. Mara's eyes hardened.
Kael noticed every detail.
"Problem?" he asked.
Mara answered slowly. "Depends what came back with you."
Before Kael could reply, something slammed into the building's front doors.
Wood splintered.
A second impact bent the metal bar across them.
Lantern light shook.
Everyone was moving now. Mara at the entrance. Dren kneeling behind a cabinet. Sera drawing a thin spike of sharpened bone from her sleeve.
Renn looked at Kael and smiled like this was almost fun.
"Good news," he said.
The third impact tore one door off its hinges.
Moonlight spilled across a shape too large for the frame, shoulders scraping both sides, skin pale and scarred, jaws wet with hanging strands of flesh.
Renn's smile thinned.
"That's the thing that eats nests."