Detective Hoffman is deemed hero after he saves a young girl and "escapes" one of Jigsaws game, or do it seems. Special Agent Strahm is suspicious of him after his assistant, Agent Perez dies. While Strahm dives into Hoffman's past, a group of 5 people who all helped burn a building which was supposedly abandoned are put to a series of tests, set up by the Jigsaw Killer.