Nick Larson discovers a supernatural way to alter his life and travel back in time to key moments in his life by looking at photographs.

Between the events of 'Saw' and 'Saw II', a sick and desperate John Kramer travels to Mexico for a risky and experimental medical procedure in hopes of a miracle cure for his cancer, only to discover the entire operation is a scam to defraud the most vulnerable. Armed with a newfound purpose, the infamous serial killer returns to his work, turning the tables on the con artists in his signature visceral way through devious, deranged, and ingenious traps.

While doing a thesis about violence, Ángela finds a snuff video where a girl is tortured to death. Soon she discovers that the girl was a former student at her college...