
Two men wake up at opposite sides of a dirty, disused bathroom, chained by their ankles to pipes. Between them lies a dead man loosely clutching a hand-held tape player and a handgun. Each finds a tape the perfect fit for the player in their back pocket. They play the tapes. One is threatened, the other isn't. But they have a task: One must kill the other by 6:00, or his wife and daughter will die. They find hacksaws in a toilet, and try to cut the chains, but it doesn't work. They are the two newest victims of the Jigsaw Killer. In a flashback, we learn of Amanda, a girl who falls victim to the Jigsaw Killer. On her head is a mask, which is hooked into her lower jaw. There is a timer on it. Only one key will unlock it, and that...