The zero on the doorplate did not go dark.
Martin Tan stood beneath the last fluorescent tube without touching the handle.
The darkness behind him kept coming. This was more than a row of lights switching off. With each dead tube, the corridor itself seemed to shorten. Doors, scratch marks and the chair holding his staff pass disappeared into the black one by one, and no echo returned from anything it covered.
Something moved behind the door.
A porcelain bowl touched down on wood. Chopsticks were set neatly beside it. Someone was laying the table.
Martin Tan checked his phone. 23:48:19. Four bars, but the emergency call still showed Connecting. The corridor clock had already vanished into the dark. Its last reading had been 22:35:19. The difference remained exactly seventy-three minutes.
He slipped the evidence bag into the inside pocket of his jacket, then knocked twice with one knuckle.
No one answered.
The brass handle felt warmer than the surrounding air. It held no moisture, no dust. Someone might have released it only seconds earlier. Martin Tan pressed down with his thumb.
The latch withdrew with a soft click.
The door opened inward four centimetres.
Warm air slipped through the gap, carrying fried fish, soy sauce and old timber. It pushed aside the corridor's damp chill. Martin Tan's hand went still on the handle.
He knew that smell.
Not as a particular dish. It was what remained when the same things lived together for years: a cloth that never quite dried beside the kitchen window, varnish on a rattan sofa, the medicated oil his mother kept under the television, newspapers that held a trace of every rainy season.
Martin Tan pushed the door wider.
There was no room beyond it.
There was the home he had lived in until he was fifteen.
Pale green terrazzo ran from the threshold into the living room. To the right stood a low rattan sofa, one arm bound in black electrical tape. The television opposite was as deep as a storage crate, its screen covered by a white cloth his mother had crocheted. A three-bladed ceiling fan turned slowly overhead, making a small click once every revolution.
None of these details mattered. Not one was wrong.
Martin Tan knew that the bottom drawer of the television cabinet would not open. His father had dropped a coin into the runner, and ever since, the drawer had pulled a little to the left before jamming. He knew the pencil line behind the sofa, painted over years ago, would show through on wet days. He knew a supermarket magnet covered a missing tile beside the kitchen door.
His memory had contained no gap before this door opened.
This flat, his father, his mother, the years the three of them had spent here—everything had stood in a clean, unbroken sequence. That was why the fourth chair looked so quiet.
A folding table stood near the window. On it were fried fish, clear soup and a plate of dark greens. Four bowls had been placed around the table. Four pairs of chopsticks rested across their rims.
Martin Tan remained outside.
Another light died behind him. The darkness was six metres away.
He extended his phone across the threshold. The camera showed no living room. It showed a grey-white wall less than half a metre from the lens. In the centre was the short mark he had scratched beside the door.
He moved the phone. The texture of the wall tracked across the display, while the living room in front of his eyes remained still. The fan kept turning. The surface of the soup trembled beneath it.
Martin Tan started recording and lowered the phone without changing its angle. The screen continued to show the wall.
The light five metres away went out.
He stepped through the doorway.
The temperature changed the moment his shoe met terrazzo. The flat was at least eight degrees warmer than the corridor. Humidity clung to his skin—the close, airless heat of a home without air-conditioning. Rain was falling here too, drumming on a metal awning with the density of fingernails.
He left the door open.
Martin Tan took a pen from his pocket and wedged it between the door and frame. The plastic barrel bowed under the pressure, holding the gap. Beyond it, the corridor's final lights floated in a long band of grey.
He checked the exit first. Then he approached the table.
The place settings did not match. The blue-rimmed bowl by the window belonged to his father; tea had left a stain in its base that no amount of washing removed. The plain white bowl nearest the kitchen was his mother's, chipped along one edge. The bowl facing the living room, printed with faded green squares, was Martin Tan's.
The fourth bowl belonged to a child.
It was small, with a ring of white rabbits worn almost colourless around the outside. Its chopsticks were shorter than the other pairs, each topped with a blue star. The chair stood closer to the table, a thin exercise book on its cushion to raise whoever sat there by a few centimetres.
Martin Tan looked at the book. It lay face down. There was no name to read.
He remembered his father sitting by the window, his mother nearest the kitchen and himself with his back to the living room. Their places had never changed. The fourth side of the table had always been against the wall. There could not have been a chair there.
His body disagreed before his mind could.
As Martin Tan moved towards his own place, he turned sideways automatically to avoid the fourth chair. His fingers went to the plate of fish. They had already begun pushing it farther from the child's bowl before he understood what he was doing.
The movement required no thought. It carried the ease of something repeated hundreds of times.
Martin Tan drew his hand back.
The soup was warm. The rice had dried slightly on top, yet each of the four bowls held a shallow hollow, as if everyone at the table had taken one bite. A single grain clung to the inner wall of the child's bowl.
He opened an empty evidence bag.
The pen at the door gave a small creak.
It was still wedged in place, but the darkness had moved closer. It now covered most of the corridor outside. Its edge stopped in a perfectly straight line beneath the last light. There was no mist in it, no gradation and no shadow. Whatever it reached lost all depth, as if someone had painted the space flat in black ink.
Martin Tan left the grain of rice where it was.
No record could tell him what would happen to an object carried across this boundary. More important than a sample was the possibility that someone was still inside the flat.
“Is anyone here?”
The living room absorbed his voice. Rain, fan and refrigerator continued around it, but no echo came back.
A long rectangular mirror was built into the wall above the shoe cabinet. Martin Tan had glanced at it when he entered. It had held only the door, the sofa and half of the dining table.
Now there was a girl in the reflection.
She was sitting in the fourth chair.
Martin Tan did not turn around.
The girl looked eleven or twelve. She wore a white short-sleeved blouse, and her hair fell just past her shoulders. A pale blue star clip held one side behind her ear. The other side hung loose, hiding most of her face. Her head was bowed, her hands resting flat on her knees.
The fourth chair in the real room was empty. The exercise book did not bend under anyone's weight. No breath disturbed the faint steam above the child's bowl.
Martin Tan moved half a step left. The reflected sofa, table and his own body shifted with the angle. The girl did not. She remained fixed in exactly the same position, as though the mirror were not reflecting her but keeping her inside the glass.
He raised his phone.
In the camera frame, the mirror reflected only a grey-white wall.
“Who are you?” Martin Tan asked.
The girl lifted her head slightly. Her hair slipped aside without revealing her face.
Her lips moved.
The voice did not come from the mirror.
“Gege.”
The word meant older brother.
The word sounded behind Martin Tan and to his right, near the short passage leading to the bedrooms.
He turned at once.
No one was there. The bathroom door stood half open. Both bedroom doors at the far end were closed. A warm yellow bulb lit an old paper calendar on the wall, though the month was too far away to read.
When he looked back at the mirror, the fourth chair was empty.
At the far end of the reflected passage, a girl's shadow crossed one doorway. A white sleeve appeared for less than a second and slipped behind the wall.
Martin Tan entered the passage.
A form of address was not evidence, he told himself. Whoever knew about the call could know what the man had said at the end. A voice could be staged. A room could be reconstructed from his memory. Even if a girl existed here, it did not prove she was related to him.
Yet as he passed the bathroom, his right hand settled against the doorframe without conscious instruction.
Two columns of pencil marks measured children against the wood. The taller column was labelled Xu in crooked handwriting. The second ended much lower, with more marks crowded together. Someone had rubbed out the name beside them so violently that only white, frayed traces remained.
Both columns stopped in the same year.
The last mark on the left read 176 centimetres. Martin Tan remembered the measurement. He remembered his mother laughing that he had finally grown taller than his father.
He did not remember another child standing beside him.
The final mark in the second column was 143 centimetres. A half-finished blue star had been drawn at the end of the line.
A page turned behind the bedroom door.
Martin Tan approached. There was no lock on the door, only a loose silver knob. When he pressed his ear to the panel, paper shifted again. Then a pencil began moving over it.
Scratch. Scratch. A pause. Then more writing.
The rhythm stirred an impatience in his chest that had no source. It felt as though he had once waited outside this same door for someone to finish a problem, had waited far too long, and had not been allowed to leave without her.
He took hold of the knob.
Something snapped in the living room.
The pen holding the front door had broken.
The door was closing.
Martin Tan released the bedroom knob and ran. Only one corridor light remained visible outside. Darkness pressed against its glow. The brass handle was slowly rising, as if an unseen hand on the other side had just let go.
The fourth place setting had vanished.
The table now stood flush against the wall with three chairs around it. The exercise book, rabbit bowl and star-tipped chopsticks were gone. Its surface was clean enough to suggest they had never existed. Only a damp circle remained in the grain where the fourth bowl had been.
Martin Tan stopped for a fraction of a second.
The room had corrected itself to match his memory.
In the mirror, the girl stood behind him.
She was close enough that the top of her head reached his shoulder. The pale blue clip still held the hair on her right. The left side hung loose. She raised one hand as though to catch his sleeve.
Martin Tan felt nothing touch him.
In the mirror, she lifted her face. It was not distorted or blank. The light was simply too dim. Her features had bled together like an old photograph left in water, every familiar line softened past recognition.
“Gege,” she said again.
This time, her voice was shaking.
The front door was one hand's breadth from closing.
Martin Tan could still have stepped through.
Instead, he turned around.
The room behind him remained empty. At the end of the passage, a bedroom door had opened a crack, releasing a wedge of yellow light. Beside it, the name erased from the frame seemed for a moment to darken.
“I'm here,” Martin Tan said.
It was the first time he had answered her.
The final corridor light went out.
As darkness crossed the threshold, every sound in the flat stopped at once. The fan froze halfway through a turn. Raindrops hung from the edge of the awning. The refrigerator's hum was cut cleanly in two. The door slammed, sealing the zero on the other side.
The floor vanished beneath Martin Tan.
The sensation of falling lasted a single second. There was no wind and no height. His shoulder struck something hard. The phone skidded away. Darkness closed over him from every direction.
Something small pressed into his right palm.
Martin Tan knew both hands had been empty when he entered. The evidence bag was inside his jacket. His phone had been in his left hand. He had taken nothing from the table.
Slowly, he opened his fist.
A child's hair clip lay in his palm. It was a five-pointed star moulded from pale blue plastic, worn white at the edges, with one tooth broken through the middle. It carried none of the corridor's water and none of the flat's dust, but a single strand of fine, long hair was wound around its metal spring.
Martin Tan had never seen it before.
His thumb had already found the broken tooth.
When he was a boy, he had repaired that exact spot three times.