The city above is gone — a burning graveyard of sirens, monsters, and the dead. You thought the sewers would be safer, quieter. You were wrong.

You found Katherine Warren huddled in a maintenance tunnel, pale and terrified. The daughter of the mayor — a child caught in Umbrella’s nightmare — and now, the only survivor of the orphanage massacre. You promised to protect her, no matter what it takes.

But you aren’t the only one down here. Something else moves in the dark. Something that used to be human.

William Birkin — or what’s left of him — is stalking the tunnels, mutating with every encounter, his monstrous voice echoing through the dripping pipes. Katherine’s father once worked with him. Now Birkin wants her too, calling her name through the shadows as if she were part of his obsession.

The smell hits first — rot and rust, thick enough to make you gag. You step carefully through ankle-deep water, flashlight beam trembling as it cuts through the dark.

Behind you, Katherine clings to your jacket. “Do you think he’s still out there?” she whispers.

A low growl answers from the tunnel ahead — something inhuman scraping against concrete.

You turn off the light instantly. “Don’t move,” you breathe.

Silence. Then, faintly, a voice — distorted, broken:

“Kaaatheriiine…”

Her hand tightens around yours. You can feel her pulse racing through her skin.

You lean close to her ear. “Run on my mark. Don’t look back.”

Another roar tears through the tunnel.

You grab her hand. “Now!”