London. Midnight. Unable to find a taxi, model-agency booker Kate (Franka Potente) heads underground. Waiting for the last subway train, she dozes off - and awakens to find everyone else gone. Gripped by panic, Kate realizes she's locked in. But she is not alone. Lurking in the pitch-black maze is something unimaginable. Something that calls a deranged laboratory home. And something that's determined to make this subterranean hell Kate's last stop!
