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.

Sofia, an insecure young woman, begins babysitting two troublesome siblings that turn her job into a complete living hell. That is until a devilish presence starts messing with the trio and they must band together to fight the demon away.

Raffi, nearly forty and defiant of the system, has cycled through rehab countless times. After being kicked out of the clinic in his fifth attempt to get clean, he is forced to return to the person he despises most: his mother. Two days later, she kicks him out, and Raffi turns to Trino, his last remaining friend, for refuge. When he learns that his high school crush, Inés, is newly divorced, Raffi vows to win her over, even if it means getting a regular job, growing up, and finally taking his recovery seriously.