Jigsaw killer John Kramer returns in the most disturbing installment in the SAW franchise. The events are between SAW I and II, we find a John, sick and desperate, who goes to Mexico to undergo an experimental operation capable of curing his cancer, but he discovers that all this is a scam. aimed at vulnerable and distressed patients. Driven by a new goal, the famous serial killer returns to his work, and will take his revenge on these crooks in a terrible “game” of which he has the secret, through traps always more Machiavellian and ingenious than each other. others.