The sixth floor of Association HQ smelled like old coffee and recycled air.
Kai noticed this immediately — the way the ventilation system pushed the same stale warmth through the same grey corridors, the fluorescent lights humming at a frequency just below hearing but not below feeling. The carpet was a shade of beige that suggested someone had chosen it specifically to hide stains. The walls had motivational plaques from fifteen years ago that nobody had bothered to take down.
He found his desk near the eastern window. Sat. Looked out at the city.
Somewhere in that city, he thought, Ren is at his old desk. Being exactly himself. Like none of this is interesting.
He opened his files and tried to focus.
He managed it for about forty seconds.
The briefing room was smaller than the hallway suggested it would be — seven chairs around an oval table, a screen at the front, and the particular quality of silence that accumulated in rooms where serious things were discussed regularly. It smelled faintly of whiteboard marker and something else, something metallic that Kai couldn't identify until he realized it was coming from the equipment cases stacked along the far wall.
Gate gear. The real kind. Not the standard-issue tablets and communication devices. The reinforced tactical cases that went into Class-B clearances and didn't always come back undamaged.
He took the seat closest to the door.
Agent Davan arrived exactly on time — late thirties, wire-framed glasses, the kind of stillness that came from having delivered bad news so many times it had become a professional skill. She didn't greet them. She pulled up the map.
Forty-one markers bloomed across the screen.
Kai had already counted them. Already seen the shape before she tapped the first one.
Border districts, he thought, his eyes moving across the pattern without meaning to. Always border districts. Always after midnight. Always the same — clean, complete, no trace.
He looked at his hands on the table. Looked back at the screen.
I know what this is.
He didn't say it.
"Six minutes," Davan said.
She let it sit in the room.
"Our Class-B clearance average is twenty-eight minutes. A-rank individual record is nineteen." She pulled up a timestamp overlay. "Whoever is doing this is closing Class-A Gates — the most dangerous classification in our system — in six minutes. Alone."
The young transfer two seats down raised his hand. "What does Class-A actually mean? In real terms?"
Davan looked at him. Then she pulled up a different file.
The footage was aerial. Drone camera, shaky at first, then stabilizing. A Gate — four stories of blue-white light pulsing against a grey industrial skyline. Around it: hunters in formation, the controlled urgency of people doing their jobs while being very aware of what was inside.
Then the Gate opened fully.
The sound came through the recording even over the ventilation hum — a low, structural groan that seemed to come from the air itself rather than from any specific direction. And then something came through.
Kai heard Sera's breath change beside him. Just slightly. Just enough.
The footage tracked the entity — twelve meters, six-limbed, moving with the particular wrongness of something that had evolved for a different physics than this world operated on. It hit the first barrier and the barrier simply stopped existing. The camera tracked three hunters going down in the initial impact, then the feed cut to a wider angle as the response teams repositioned.
"This incident lasted six hours," Davan said, voice flat. "Eleven hunters. Thirty-two civilians. Four hundred million in infrastructure damage." She closed the file. "The entities in our forty-one incidents were of equivalent or higher classification." She looked around the table. "Closed in six minutes. No casualties. One set of footprints."
The room was very quiet.
The equipment cases along the wall seemed heavier suddenly. More real.
Sera uncrossed her arms. Slowly. Like she was being careful about it.
"One person," she said.
"One set of footprints," Davan confirmed. "Every time."
After the briefing, the hallway felt different.
Kai walked and didn't look at anything specific and tried to process the footage he'd just watched — the specific wrongness of a Class-A entity moving, the sound of barriers failing, three people down in four seconds — and found that it kept sliding off his attention, replaced by forty-one markers on a map and the pattern he'd seen before Davan had said a word.
"Hey."
Sera caught his arm. Made him stop.
She was looking at him with that expression — the one she'd had since they were twelve, the one that lived underneath the usual easy energy, the sharp intelligence she never quite hid as well as she thought she did. Her hand on his arm was very still.
"That footage," she said quietly. "Class-A. Six hours. Eleven hunters."
"I know."
"And someone closed twelve of those Gates alone. In six minutes." Her grip tightened slightly. "Kai. I've known you since we were kids. You walked into this briefing already knowing what you were going to see, didn't you."
The hallway was empty. The ventilation hummed. Somewhere below, elevators moved between floors.
"I had a suspicion," he said carefully.
"A suspicion." She looked at him for a long moment. The golden-brown of her eyes was very direct in the fluorescent light. "Tell me that suspicion isn't about who I think it's about."
He held her gaze.
She had known him since they were twelve. She had watched him and Ren navigate four years of secondary school and two years of university and whatever came after. She had sat in the same rooms and noticed the same things and, unlike Kai, had never learned to be diplomatic about what she noticed.
"I need more information," he said. "Before I decide anything."
Sera studied him. Her jaw was set in the way it got when she was choosing not to say something she wanted to say.
Then she released his arm.
"Right," she said quietly. And then, lighter: "When you have enough information. You know where I am."
She walked away.
He watched her go and thought about the footage — about what a Class-A Gate looked like from the inside, about what it took to close one in six minutes, about the specific quality of calm required to walk away from that and go sit at an office desk and say mm and what else is there and already know about Gate incidents that weren't on the news.
He went back to his desk.
He worked until seven.
The dispatch came through on his way home.
DISTRICT 12: GATE OPENED 18:43. CLASS-B. RESPONSE TEAM DEPLOYED.
He stood on the street with his phone and watched it. Commuters moved around him. The evening air was cold and smelled like exhaust and the particular metallic edge that meant a Gate was open somewhere nearby — that faint pressure behind the teeth he'd grown up learning to ignore.
Eleven minutes later.
DISTRICT 12: GATE CLOSED ON ARRIVAL. BOSS-CLASS ENTITY DECEASED. INVESTIGATION ONGOING.
Six minutes.
He kept walking.
He got home. Made dinner — ate it standing at the counter. Stood at the window after, looking at the city moving through the dark.
Then he did something he hadn't done in two years.
He called Ren.
Four rings. Then:
"Kai." Calm. Unhurried. Exactly what it always was.
"Where are you right now?"
A pause.
Half a second. Maybe less. He had to be listening for it to catch it — and he had been listening, because Ren didn't pause, Ren had never paused in four years of knowing him, Ren answered things like he'd already decided the answer before the question finished.
"Home," Ren said. "Why?"
"District 12. Tonight."
"I saw it."
"Did you."
"It was on the feed."
Kai stood at his window. Below, the alley was dark except for the overhead light — steady, not flickering. It had been steady for two nights now.
"Right," he said. "Of course it was." A beat. "Goodnight, Ren."
"Goodnight."
The call ended.
Kai stood with his phone and turned it over in his hand and thought about half a second. About the voice that had been exactly the same before and after — calm, complete, nothing given away. Except for that half second in the middle where something had shifted and then shifted back so fast he almost missed it.
Almost.
He went to bed.
The alarm would go off at 7:14.
And forty-two Gates were closed now, and someone was still out there, and three feet of office space wasn't enough distance to hide what Kai was becoming increasingly certain he already knew.