The corridor was the same as the one he'd left.
Left ran back toward the junction. Right ran forward. The tunnel bent at the edge of the light and disappeared.
He went right.
His first step off the threshold found the water colder than he'd registered before. He steadied against the doorframe with his left hand, let the water settle around his boots, and moved.
The shoulder pulled on the second step — deeper than the joint, where the bandage sat against the entry point. He leaned fractionally left and kept going.
He checked the corner before he committed to it. Left hand forward, weapon up, angling himself so the right shoulder stayed back from any surface. The bend was clear.
The next section ran longer, the far end past the reach of the single working strip overhead. He moved along the right wall, left hand trailing the concrete. Mid-shin water, floor consistent for the first ten meters. A pipe overhead groaned — structural, something adjusting to pressure somewhere above — and settled. He moved on.
The corridor opened into a wider section, the ceiling rising two feet, the channel floor dropping. He felt the resistance climb before he saw the depth change, the cold finding his thighs. He slowed, found the new floor level, and held there.
The current against his shins ran forward and faintly left. He tracked it and moved.
The floor dropped under his left boot without warning — the channel bed stepping down four inches, his weight already committed. He caught himself on the right leg and the bandage shifted with the catch. He stood there, adjusted the grip on the Matilda, and moved again.
The water came up as the floor dropped. Waist-deep now, colder.
It came from directly below.
No displacement. No surface break. Something rising through the floor of the water and finding him, the impact hitting his right side at the shoulder and driving upward through the bandage and the world went sideways before he understood what had touched him.
He went into the wall. Right shoulder first. The impact reset everything the bandage had been managing and he heard himself make a sound he hadn't chosen and the Matilda was still in his hand because his fingers had decided that before the rest of him caught up. He got his left arm against the concrete, pushed, found his footing.
Something had his right arm.
Higher than the hand. Just below the shoulder. The grip was wrong — not fingers, not claws, something wider, the pressure distributed across a surface too large to be either. Cold. Closing. The Matilda was rotating away because the arm was rotating and he couldn't stop it.
He fired with what angle he had.
The round went into the water. The muzzle flash lit the surface for a fraction of a second — something below it. Mass. Width. A shape too large for the corridor that was somehow in it, the architecture wrong in a way he couldn't finish processing before the dark came back.
The grip tightened.
Left hand found the wall, palm flat, and he shoved himself horizontal — changed the angle from under to sideways, his boots scrabbling on the channel floor, finding it, losing it, finding it again. The water came up to his chest and he fired twice more into the dark below the surface, no target, just the space where the mass had been, and felt the grip shift — not release, redistribute, adjusting for a better angle.
He got the barrel down and fired again. Contact range. The muzzle flash was inside the water this time, a brief submerged white, and the grip released.
Not fully. Just enough.
He threw himself right and his boots found the floor at a wrong angle and he went to one knee, water at his chin, left hand catching the wall, right arm hanging. He got his feet under him. Pushed. Made it upright.
The water settled in slow concentric rings. His breathing had fractured — the rib ceiling collapsed into something shorter than before, each inhale finding less room than the last.
He turned in place. One degree at a time, the Matilda moving with his eyes. Strip light eight meters back. Surface flat. Ahead: dark. Left wall, right wall.
Nothing.
He moved to the right wall and stayed there. He lowered his stance until the water rose from waist to chest, changed the physics of the next grip. Left hand on concrete. He held the wall and watched the surface.
Two minutes. Nothing.
Then — forward and left, maybe ten meters — the current shifted. A pressure change against his left side, something altering the flow by occupying space. It held for three seconds and normalized.
He didn't wait to see if it came again. He started moving — along the wall, left shoulder leading, back close to the surface. Slower. Both sides of the channel, not the middle.
The walkway appeared twenty meters on — the channel splitting, the main flow dropping into a lower section through a concrete lip, an eighteen-inch shelf running along the left wall at water level. He took it. Solid footing. One side covered.
He moved along it with his left hand on the wall, stance lower than the shelf required. The lower channel ran parallel to his right, knee-deep, dark, the surface moving at a different rate.
He watched it the whole way.
The attack came from the wall.
Weight from above and to the left, driving him right, and the walkway edge was there and he went over it. He hit the lower channel on his right side. The shoulder. The water came up around his face and he got his left arm down before it closed over him, got a boot to the floor, pushed. On one knee, water at his chest, the Matilda still in his left hand.
The thing was on the walkway.
One second — low and wide, wet-surfaced, the far strip catching it in segments. Its head pointed at the space ahead of him, where he'd been going, as though it had already decided where he was going to end up.
He fired once from his knee. Shot went wide and high. He fired again — the creature flinched right but held the walkway. One pace back. That was all it gave him.
He got his feet under him. Both boots on the lower channel floor, water at his chest. He brought the Matilda up and tracked the walkway and the thing wasn't on it anymore.
He turned left.
Wrong direction. It came from the right — below the waterline in the lower channel, finding his right leg above the boot. This time his center of gravity was already compromised.
He went down fully.
Water over his head. Dark. Cold. The Matilda in his left hand and the grip at his right leg pulling. The channel floor somewhere below his left boot that he couldn't find. He fired into the water — muzzle flash a brief smear of light in the dark — and got his left boot to the channel wall and shoved.
The grip shifted.
He came up gagging, left arm going to the walkway edge and catching it. He hauled himself up with his left arm alone, the right doing nothing, the right leg dragging. His knee found the walkway. Then his boot.
The thing was in the lower channel. Wide rings moving outward from two points, overlapping. He fired three times into the larger ring. First round hit the lip. The second and third went into the water.
The rings slowed. The surface flattened.
He got upright and moved. Watching the lower channel while the water settled and told him nothing. The maintenance door was fifteen meters ahead — filed on the way in.
Ten meters. The surface broke behind him. He turned without stopping — upper body only, fired twice at the break point. The ring expanded and didn't repeat.
Five meters.
The door was steel. Wheel lock. He grabbed it left-handed — rusted, resistant. Quarter turn. Another. The surface broke again, closer, the thing repositioning. He dropped his grip, raised the Matilda, and it was already below the surface. The ring hit the channel wall and came back.
He turned back to the wheel. Full rotation. He pushed.
The door opened six inches, bottom edge dragging on concrete. He pushed again with his left shoulder and it gave four more.
He went through sideways.
He got the door pulled behind him and ran the wheel lock — two full turns. He put his hand against the surface.
Cold. Still.
He turned.
Low electrical hum. A monitor cycling, throwing pale light at the near wall in intervals. He cleared the corners — conduit housing, shelf rack, nothing. Control panel, most switches dark, three amber indicators. A second door in the right wall, rubber seal at the base, cold surface, no vibration behind it.
He stood in the middle and listened.
The cycling monitor. A guttering fluorescent at the far end. The hum. The slow drain in the floor.
Nothing else.
He confirmed the first door's lock. Crossed to the control panel, followed the conduit to a power distribution node on the right wall. Manual bypass lever, upright.
He pulled it down.
A second monitor woke. Snow. Then a partial signal resolving through interference — a corridor, different from the sewer. Walls cleaner, ceiling lower, lighting recessed. Dry floor.
A sealed door at the far end. Card reader to the right. Indicator light red.
Two figures in front of it.
The first was standing. Dark fabric, close to the body — nothing loose enough to catch. Back partially to the camera, weight distributed in the way of someone managing a position rather than resting in one. Facing the door, then turning to check the corridor behind her — and for a second the camera had her face.
Leon looked at it longer than he needed to.
Sharp features. Nothing in them moved unless it needed to. Hair cut short and uneven, sitting around the jaw, slightly wet — and when she turned it didn't move the way it should. He noticed it anyway.
Eyes crossing the corridor the way you clear a room, methodical, without landing anywhere.
He cut the thought before it formed.
What she was doing was standing alone in an underground corridor with a sealed door and an unconscious girl and a rotation she'd been running long enough that it had become automatic.
She turned back to the door.
The economy of it — no wasted motion, no adjustment, the same line every time — was the kind of thing that came from somewhere specific.
Ada.
The second figure was on the floor.
Seated, back against the wall, head forward. Small. One hand flat against the floor, the arm locked, holding a position that was keeping her upright from the wrong direction.
Hope.
Ada moved to her — three steps, crouching, a hand to the shoulder. The figure didn't respond. Head stayed forward. Ada held the position a moment, stood, turned back to the door. Looked at the card reader. Then at the corridor.
She was waiting for something that hadn't come yet.
He looked at Hope's hand on the floor. The arm locked, doing the work her core had stopped doing.
He dropped the magazine and counted in the monitor light. Seated it back. The spare: fourteen rounds by feel. Partial first, then the spare.
He raised his right arm — thirty degrees before the joint ended it. He put his left hand to the shoulder from the outside and pressed. The response was immediate. The dressing was still there.
He looked at the second door.
He ran the wheel lock back, held the door closed, listened. He pulled it open four inches. Dark corridor beyond. Water starting eight inches below the floor level.
Nothing moved.
He stepped down into the cold and moved without pausing at the contact. Left hand forward on the wall. Matilda at chest height. Right arm at his side.
The room's hum dropped behind him.
He went lower than before. Slower. One boot finding the floor before the other left it.
He went forward.