French dancers gather in a remote, empty school building to rehearse on a wintry night. The all-night celebration morphs into a hallucinatory nightmare when they learn their sangria is laced with LSD.
A quadriplegic man has a trained monkey help him with his paralysis, until the little monkey begins to develop feelings, and rage, against its new master.
Bodies are turning up around the city, each having met a uniquely gruesome demise. As the investigation proceeds, evidence points to one suspect: John Kramer, the man known as Jigsaw, who has been dead for over 10 years.