By the time Aiden hit the avenue, it no longer looked like a place built for survival.
Cars sat at stupid angles across the road. A bus had jackknifed through the intersection. A taxi was halfway up the sidewalk, engine still whining. Smoke dragged low between the buildings and carried fuel, hot dust, and the rank animal stink of things that had no business existing in a city.
He kept moving.
The first monster saw him and dropped from the roof of the bus.
It hit the pavement so hard the ground cracked.
Up close, it was worse.
One eye milk-white. One eye wet and fixed. Hide split in places, slick in others, as if two carcasses had been stretched over the same frame and stitched by a drunk. It went low on its forelimbs and stared at him with that awful patient focus predators got when panic usually did half the work for them.
Aiden cut left.
The thing lunged.
Its claws punched through the hood of a sedan where his ribs had been half a second earlier. Car alarms exploded around him. Glass went everywhere. Aiden snatched a broken side mirror off the asphalt and hurled it without breaking stride.
Not to hurt it.
Just to interrupt.
The mirror burst against the side of its face. The thing jerked. That one hitch was enough. He cut behind the sedan, planted one foot on the crushed bumper, and threw himself over the divider into the opposite lane.
Bad landing.
Pain up the ankle.
Didn't matter.
Behind him, the monster hit the car so hard the whole frame shoved sideways with a scream of metal.
Above the street, one of the Association drones kept talking in that clipped machine voice meant to pass for calm.
"Emergency response convoy entering perimeter. All civilians proceed to the nearest shelter corridor. Hunters below authorized rank are prohibited from engagement."
There were no hunters.
Only civilians getting eaten by delay.
Iris's building was ahead.
The lobby had turned into a choke point. Office workers were trying to force their way out while others, glass-cut and bleeding, were trying to get back inside because the street had become worse than the stairwell. A revolving door turned uselessly against a body jammed halfway through. One security guard stood by the shattered entrance shouting for orderly movement while blood soaked through one sleeve.
No one listened.
Aiden hit the edge of the crowd and shoved his way in.
A woman grabbed his arm.
Mascara had run down one cheek. Blood covered one shoe and did not look like hers.
"Don't go in there," she said. "The floors are coming down."
"My sister's inside."
That did it.
She let go.
Not because she agreed. Because disaster had a way of making some decisions look private.
The security guard moved in front of him.
"You can't go up. East stairwell is compromised above five. West side lost pressure in the walls. We need Association clearance."
"How long?"
The guard looked past him at something moving in the smoke outside.
He swallowed.
"Too long."
Aiden slipped past him.
The lobby lights were still on.
That made everything feel obscene.
Polished stone floors streaked with blood, muddy shoe prints, spilled coffee, sprinkler water. The building directory still flickered beside a decorative black wall as if customer service could still save this place. One elevator stood open and empty. The other was stuck between floors. Somebody inside kept hammering the emergency button.
Over and over.
"Iris."
Static.
Then, faintly, "Aiden?"
He stopped for the space of one heartbeat.
"I'm inside."
Her breath caught. "No. Why would you come inside?"
Because you were here.
He didn't waste the words.
Because if he had stayed outside and listened to her die through a phone, whatever came after that would not have been a life he knew what to do with.
"East stairwell. Are you near it?"
"I think so. The exit sign is broken. There's smoke. I can't... wait." Something crashed near her. Voices rose. "Something came through the ceiling two offices down."
He was already moving.
The east corridor was jammed. The stairwell door had been forced open and now hung crooked against the wall. People still came down in bursts, colliding into each other on the landings. A man in torn office clothes slammed into Aiden chest-first and nearly took them both down the stairs.
"Move."
He shoved off the rail and kept climbing.
Each floor smelled different.
Hot wiring on three.
Wet concrete on four.
Burst pipes and dust on five.
And above that, something deeper.
Wrong.
People had stopped coming down.
That was when he knew the flow had broken.
He reached the landing between five and six and saw why.
The stairwell wall had split open from floor to ceiling. Not wide enough to escape through. Wide enough to show him a slice of the city outside through hanging mesh and broken supports. Siren light flashed far below.
Then something hit the sixth-floor door from the other side.
The metal bent inward with a scream.
Aiden stopped.
Another hit.
The hinges tore loose.
The door blasted into the stairwell and skidded across the landing in a spray of sparks. Behind it stood a creature about the size of a large dog, except there was nothing in it that belonged to a dog. Torso too long. Hind legs bent backward too high. Mouth opening the wrong way.
It launched.
There was no time to think.
Aiden grabbed the fallen fire door and rammed it upward with both hands. The monster hit metal instead of flesh. Pain tore through his shoulders. The angle knocked the thing sideways into the ruined rail.
It scrabbled for purchase.
He shoved.
Everything he had.
The bent section of rusted steel gave way.
For one second the creature hung there, claws spitting sparks off the remaining rail.
Then it fell.
The scream went down and down and ended wet.
Aiden stood there with both hands locked on the fire door, lungs burning.
Not shaking yet.
Later.
His phone crackled.
"Aiden?"
He let the door drop.
"Still here."
The breath she let out nearly broke in the middle. Iris did not cry easily. He knew exactly how afraid she had to be for her voice to sound like that.
"I hear something in the hall," she said.
"Which side?"
"Left. No. Wait." A scrape across tile. Slow. Heavy. Not human. "Aiden."
"Lock yourself in."
"I already did."
He climbed.
The sixth floor was almost dark. Ceiling panels hung low in broken rows. Sprinkler water ran down one wall. An overturned printer lay in the middle of the corridor as if it had tried to escape with everyone else. A bloody handprint marked the glass of a meeting room.
At the next landing, the whole building lurched and slammed him shoulder-first into the wall. Concrete groaned somewhere above, a deep ugly sound that felt less like damage and more like warning.
He nearly lost his footing and saw, clear as a slap, exactly how this could end: one stupid fall backward, skull against the stairs, dying without reaching her door.
The thought made him angry enough to keep moving.
Seventh floor.
The east corridor had once tried very hard to look expensive. Gray carpet. Frosted partitions. Quiet lighting. Now half the ceiling was gone, wires hanging from the ductwork. One side of the hall had sagged inward toward the windows. The other side was lined with office doors. Some open. Some barricaded with whatever people had found first.
"Iris."
No answer from the hall.
Then, through the phone, very close now:
"Here."
He turned left.
Three doors down, a woman was trying to drag an unconscious coworker by the wrists. Her hands kept slipping. She looked up, saw him, and pointed farther down the corridor with a trembling arm.
"There was another one," she said. "It went that way."
He passed her.
Halfway by, he stopped long enough to grab the unconscious coworker by the collar and drag the body tighter against the intact side of the corridor, away from the sagging floor line.
It would not save him if the whole level dropped.
It was all Aiden had time for.
The office with the broken exit sign sat near the corner. The door had been barricaded from the inside with a wheeled file cabinet and two chairs jammed under the handle. He hit it once with his palm.
"Iris."
Something slammed into the wall across the corridor.
Not inside her office.
Opposite it.
Plaster exploded outward. A narrow black limb punched through first. Then a head forced its way after it, tearing open the partition with brute persistence. Wrong jaws. Wet bone. Black fluid streaking the wall.
Bigger than the one below.
Faster too.
Behind him, the woman screamed into both hands.
"Aiden," Iris said from behind the barricaded door. Her voice had gone thin and high now, fear at the edge of breaking. "Aiden, what is that?"
The creature turned its head.
Looked at him.
He looked back.
Then the floor gave way.