The blow did not hurt at first.
It made the world jump sideways.
Kael hit the stairs shoulder-first. His hand opened. The gun struck two steps below him, rang once against the wood, and vanished into the dark at the bottom of the flight.
For a moment, he could not tell where his body ended and the staircase began.
Then pain arrived.
It started at the back of his head and spread forward in slow, hot pulses. His cheek pressed against the carpet. Something wet touched the corner of his mouth. He tried to lift himself, but his arms refused to obey.
Footsteps moved below him.
Not hurried. Careful.
Kael forced one eye open.
The living room swam in thin, colourless streetlight. The front door was shut. The chain hung loose. The television was a black rectangle in the corner.
The man from the living room bent, picked up Kael's handgun, and looked at it with the brief, uneasy surprise of someone who had not expected the house to answer back.
Then he pointed it at Kael.
The sight settled between Kael's eyes.
Everything in him went still.
Not because he was brave.
Because being shot was no longer the worst thing in the room.
Nyx.
She was asleep at the far end of the upstairs hall. Her door had been dark when he left the computer room. She had no reason to wake up. No reason to come looking.
But Kael had always been bad at sleeping quietly. A keyboard. A chair rolling back. A cup set down too hard. Nyx noticed the small changes in a house the way other people noticed weather.
If the gun went off, she would wake.
If she woke, she would open her door.
And then she would see him on the stairs.
He tried to speak. To tell her to stay inside. To tell the men that there was no one else in the house. To say anything that might keep the next few seconds from becoming real.
His tongue would not work.
Above him, the man who had struck him shifted his weight on the stair.
Below, the man with the gun said something Kael could not make out.
The words did not matter.
They had broken into the house for money. They had found him armed. If Kael died here, Nyx would be alone in a house with two frightened men, a loose chain on the door, and a gun that had belonged to him.
The thought did not arrive as a prediction.
It arrived as terror.
They could kill her too.
Kael's fingers scraped weakly against the carpet. He tried to push himself toward the stairs, toward anything, but his body would not answer. Only the dark mouth of the gun stayed clear.
No plan formed around it.
No trick. No hidden command. No line on the map that everyone else had missed.
Just Nyx's closed door upstairs, and the terrible possibility of it opening.
His vision narrowed.
The small sounds of the house became distant.
He fought to keep his eyes open. Not for himself. He needed one more second. Long enough to know her door had stayed shut. Long enough to know she had not come out.
But the darkness was already taking the edges of the room.
The gun blurred.
The stairs blurred.
Kael's eyelids lowered.
Then he opened them.
He was standing in white.
There was no floor he could see, no ceiling, and no pain in his skull. The house had gone as completely as if it had never existed.
Several paces away stood a man.
Or something shaped like one.
Kael tried to focus on him. A dark coat. Pale eyes, perhaps. An ordinary face that would not stay still long enough to remember.
The figure said nothing.
The fear had not left him. Nyx was still somewhere beyond this impossible whiteness. So were the gun, the two men, and the unfinished second he had left behind.
That made the black window matter. Minutes earlier, it had addressed him as Cairn and announced one unresolved objective. It had appeared after the final campaign, on a client that had already closed its victory screen. It had no reasonable connection to a burglary. And whatever had interrupted death long enough to bring him here belonged to the same chain of impossible events.
He looked at the silent figure.
"So," he said, "you're the popup."