The lobby was small.
Mailboxes on the left wall — two rows of them, the metal doors hanging at various angles, most forced open at some point and never properly closed again. A staircase directly ahead, the handrail worn dark and smooth from decades of hands. An elevator to the right with an out-of-order sign taped to its door, the tape yellowed, the sign itself slightly warped from moisture. Someone had written a date on it in ballpoint pen. The ink had faded too much to read.
The smell was stronger inside. Old concrete and cooking and the chemical ghost of cleaning products, all of it layered and compressed by years of sealed air. Normal building smell, the kind absorbed so gradually that the people who lived here had stopped registering it long ago.
And underneath — that other quality. The stillness. The specific smell of a space that had been doing something for a very long time and had not been interrupted.
Adam tilted his head back and looked up the stairwell. Three floors of railing spiraling upward, the light on each landing slightly different — the second floor darker, the third warmer than it should have been, the fourth floor dim in a way that didn't correspond to any burned-out bulb he could identify from here.
"Third floor," he said.
Nobody had told them that. But the rules on the entrance door had mentioned Room 402, which put the fourth floor in the picture and made it relevant. One floor of separation between them and whatever 402 was seemed like the minimum reasonable position.
He looked at Elias.
Elias was already looking at the staircase. "Third floor," he agreed.
They went up.
The third floor corridor ran the length of the building, lit by two fluorescent tubes in ceiling fixtures, one of which buzzed intermittently — not dead, just reaching the end of its life, cycling through brightness in a slow irregular rhythm. The walls were painted a cream that had yellowed over the years into something closer to old bone. The carpet runner down the center was a dark pattern, worn through in the middle where foot traffic had concentrated for decades, the pile completely flat along a strip six inches wide.
Nine doors total. Five on the left side of the corridor as you came off the stairs, four on the right. The left side ran 301, 303, 305, 307, 309 — the odd numbers, the staircase side. The right side was 302, 304, 306, 308 — the even numbers, the window side, each room with a view of the street or the building opposite. At the corridor's far end, between the last two doors, a frosted glass window — no view, just a rectangle of grey light indicating that an outside world still existed beyond the wall.
303 was the second door on the left. The blood-written rules on the entrance downstairs had listed this room as the address. The door stood slightly ajar — not latched, the gap an inch wide, the room beyond it dark.
Before anyone moved toward it, a door opened.
The woman who stepped out was old — genuinely old, the kind of age that had compressed a person downward and settled into the bones. She was wearing a housecoat in a faded floral pattern and carrying a flat-headed mop. She set it to the floor as she emerged and began pushing it in slow, methodical strokes without looking up.
She worked her way along the left side of the corridor — past 303, toward 305. When she reached the stretch of floor in front of 304 on the right side she paused, mid-stroke. She lifted the mop. She carried it across to the other side of 304 and continued from there, working down the right side now, past 306, 308, all the way to the frosted window at the far end.
She turned and came back up the left side. When she reached the section across from 304 again she lifted the mop once more, stepped over it, set it down again on the other side.
The gap was consistent. Both passes. She mopped around 304 without touching the floor in front of it, and she did it without looking — she knew exactly where the gap was without needing to check.
She hadn't looked up once through all of it.
Adam cleared his throat. "Excuse me."
The old woman continued working.
"Ma'am."
She reached 301, turned in, and the door closed behind her.
Adam looked at the closed door. Then at the section of floor in front of 304 that remained untouched — the carpet there looking no different from the rest, same worn pile, same flat center strip. She'd lifted her mop over it both ways. She hadn't looked at it either time.
"She lives here," Ben said, already writing on his receipt. He'd found it again in his jacket pocket and had been moving the pen across it since they came upstairs. "Those were house slippers."
They had been. Foam-soled, old, the kind worn inside an apartment. Not shoes put on to come out into a corridor — the footwear of a person in their own home, doing a task they'd done a thousand times.
"Other neighbors?" Adam said.
302's door was closed. No sound from inside.
304's door was closed. But from beneath it: a thin line of yellow light. And after a moment of listening — footsteps. Slow, even, moving back and forth across the room in a pattern that had the quality of a habit rather than a purpose. Not approaching the door. Just back and forth. Back and forth. Patient and continuous, the rhythm of something that had been doing this for a very long time.
305 through 309 were all dark beneath their doors.
"303 is our entry point," Elias said. "The rules were written on its door. But we each take a room."
Adam looked down the corridor. Nine rooms, three of them already occupied. Six standing empty.
"Right," he said. "Let's see what we have."
They went through the empty rooms one by one.
On the staircase side: 305 was the first available room, just past 303 — bed, wardrobe, desk with a missing drawer, a window that looked onto the building's narrow interior courtyard where nothing grew. No direct light in the afternoons, the courtyard too enclosed to let much through. 307 was nearly identical but slightly smaller. 309 was at the corridor's far end, the last room on the left side, tucked into the corner where the corridor ended at the frosted window — the most interior room in the building, no view of the street, no view of the outside world, the window on its far wall looking into the same lightless courtyard as 305 and 307 but from a more acute angle that showed almost nothing. A clothes rail screwed into the wall in place of a wardrobe. The ceiling was the same height as the others but the room was narrower, the walls closer, the overhead bulb without a shade.
On the window side: 306 faced the street, a clean view through glass that had been recently wiped. 308 was at the far end of the right side, the window there looking out over a longer stretch of road than 306, the fog slightly thinner at this angle.
Ben went into 305, looked around, came back out, went back in. He was measuring something with his eyes. He came back out again. "305," he said, with the finality of a man who had run the numbers. He went inside and closed the door.
Adam walked to 308 and stood in its window looking out at the street below. He set his hand on the sill. He looked at the fog. He looked at the room behind him. "308," he said, and went in.
Vera had been walking the corridor slowly, looking at each door rather than the rooms behind them. She stopped at 306. She went in. Her door closed.
Clara was standing in the corridor, looking at the remaining options — 307 on the staircase side, and 309 at the end. Raymond was beside her, also looking. Neither of them had moved.
"307 is a bit bigger," Clara said, to no one in particular.
Raymond said nothing. He was looking at 309.
He walked to it, pushed the door open, and looked inside for a moment — the narrow room, the clothes rail, the window onto the lightless courtyard, the bare bulb. He stepped inside. His door closed.
Clara looked at 309's closed door.
Then at 307.
Then back at 309.
"307 is right there," Adam called from 308. He had come back to his doorway and was watching. "Perfectly good room. Windows. Light."
"I know," Clara said.
"309 has no view. It's basically a cupboard."
"I know." She looked at 307 for a moment longer. Something in her expression was private — not quite reluctance, not quite preference, the look of someone making a decision that had more behind it than the decision itself. "I'll take 307."
She went inside and closed the door.
Elias stood in the corridor.
The only room not taken was 303 — the entry room, the one with the rules still visible on its open door, the one that had no particular identity beyond being the place where they'd arrived. He looked at it. Bed, wardrobe, courtyard window, blank walls. The same as the others.
He went in.
He found the kitchen past 309 at the corridor's end — a shared space, two-burner gas hob, a small refrigerator humming to itself and empty, a sink with a dripping tap that had left a rust stain in the basin from long use. Shelves with what previous occupants had left behind: a tin without a label, two mismatched bowls, a jar of salt clumped with moisture.
On the window ledge above the sink, a pencil.
Old, worn to about two-thirds of its original length, the paint rubbed off the barrel. He picked it up. Turned it. The lead was intact. Someone had kept sharpening it until it was this short and then left it here on the ledge.
He put it in his jacket pocket and went back to the corridor.
He knocked on 302.
The man who answered was in his late forties, broad-faced. He had the look of someone displaced from wherever his attention had been — not drowsy, but temporarily absent from his own expression, coming back to it slowly as the knock found him. He looked at Elias. At the corridor behind him.
He did not look surprised.
"You're in 303," he said. Not a question.
"Yes. I'm Elias."
"Li." He looked at Elias with the settled neutrality of someone who had organized their feelings about this situation into a state of permanent managed indifference — not cold, just past the point where surprise was a useful response. "You need something, knock. Don't go upstairs."
"What's in 402?" Elias said.
Li was quiet for a moment. Something behind his expression considered the question and reached a conclusion about what to give.
"Nothing that started good," he said. He looked at the open door of 303, the rules visible from here on its inner face. "How many of you?"
"Six."
Li absorbed this. He nodded once, with the quality of a man updating a count he'd been keeping for some time.
"Don't go upstairs," he said again. He closed the door.
Elias went upstairs alone.
He stopped on the landing between the third and fourth floors and looked up. One hand on the railing. The fourth floor corridor was the same layout as the third — same cream walls, same carpet — but the light up there was different. One tube fully dead. One working at the far end, which left the near end of the corridor in a shadow that the third-floor lighting didn't reach. Through the shadow, four doors. 401 nearest. 402 beside it.
Police tape across 402's door.
Not new tape. The yellow had faded to something close to the wall color. The printed text had mostly bleached away. One diagonal strip, attached at each end with tape that had been peeling for a long time and had not been pressed back down. The loose ends lifted very slightly in the air movement from the stairwell — the only movement anywhere on that floor.
No light beneath the door. No sound from behind it.
He stood on the landing and looked at the door and felt the thing he sometimes felt in sealed spaces — in laboratories, in chambers that had held the same contents for decades without being opened. The sensation of a container that was aware of being examined. Not a sound, not a movement. Just that quality of attention coming back.
He noted it.
He went back downstairs.
By the time the corridor light shifted — a slight reduction in warmth, the fluorescent buzz fractionally higher in pitch — the building had given him what it was going to give today.
Adam came out of 308 with two cups of water from the kitchen tap. He handed one to Elias and looked at the corridor with the expression of a man who had completed his assessment and was now sitting with its results.
"It's getting dark," he said.
"Yes."
"Rule one says no corridor movement after eleven p.m."
"Yes."
He checked a bare wrist. Dropped his arm. "What time is it?"
Elias looked at the frosted window at the corridor's far end — the grey light behind it carrying the flat density of late afternoon sliding toward evening. "A few hours," he said. "Maybe less."
Adam drank some of the water. He looked at 304's door, the yellow line still steady beneath it, the footsteps still moving in their patient rhythm. Back and forth. Back and forth.
"That hasn't stopped," he said.
"No."
"Since we arrived."
"Yes."
He was quiet for a moment. Then: "Stoneface."
"Yes."
"The rules on the door. The old woman and her mop. Li. The tape upstairs." He looked at Elias directly. "Whatever's in this building — we're not just visiting somewhere. Are we."
Elias looked at the end of the corridor. At 309's closed door and 307's closed door beside it and the narrow space between them, the two rooms where Clara and Raymond were now on opposite sides of a wall from each other in a building that had been doing something to people for a long time.
"No," he said. "We're not."
Adam held the answer for a moment. Then he nodded — not agreement exactly, more like the acknowledgment of something he'd already known and had been hoping to hear contradicted.
"Okay," he said.
He went inside his room. The door closed.
One by one the lights appeared under the doors — Ben's first, a thin yellow line under 305, probably still writing. Then 303, Elias's own. Then 307, a brief flicker as Clara found the switch.
309 stayed dark. Raymond had either found nothing to do or needed no light to do it.
304 across the corridor stayed lit. The footsteps continued. Back and forth, back and forth, the sound of a thing that had made this particular journey so many times it no longer needed to think about it. Elias sat on the edge of his bed and listened to it and turned the pencil over in his fingers — old, almost used up, worn to almost nothing — and looked at the ceiling of a room that had been waiting, in one way or another, for a long time.
Outside, the grey deepened.
The building settled around all of them, patient and without comment.
Night was coming.