During the investigation of the details of bloody deeds of an unknown assassin, a detective Eric Matthews finds himself thinking that they are very similar to the Saw – a famous serial killer, who managed to disappear leaving a lot of victims behind. Matthews is right. Saw again took up his awful craft. Only this time, instead of two people he locks eight people in the room of death with the only way to get out alive. Eight strangers unrelated to each other are forced into a crazy killer game where the stakes are their lives.