A sick and desperate John 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.

John Kramer (Tobin Bell) has made a return. The latest and most spine-tingling installment in the SAW franchise delves into the untold chapter of Jigsaw's most personal game. It's set between the events of SAW I and II. Ailing and desperate, John embarks on a risky and experimental medical procedure in Mexico, hoping for a miracle cure for his cancer.

However, he soon discovers that the entire operation is a deceitful scheme aimed at exploiting the most vulnerable. Armed with a newfound sense of purpose, John returns to his mission, flipping the tables on the con artists in his trademark visceral style, employing a series of ingenious and terrifying traps.