Thrown naked in a desolate room with thirteen strangers, Tonya Mane discovers she is playing a deadly game. She must figure out the reason for her abduction. In the room, Tonya finds a tape recorder that explains the rules, one of the which state "Only those without collars can break the rules". One of the strangers cross a forbidden zone, and the electric collar that he wears kills him instantly. A box marked "Pieces" catches Tonya's interest, but none of the strangers tell her what is inside. Another stranger finds a piece of paper in his pocket; written on it is, "Hint: piece the pieces". Another rule is shown that players may not adjust their collars. As the game progresses, they become mad and frantically try to find a way out. The host explains that there can be only one winner, and the prize is that person's life.