Detective Eric Matthews (Donnie Wahlberg) finds himself thrust into a nightmarish game orchestrated by the diabolical Jigsaw (Tobin Bell), a terminally ill mastermind who tests his victims' will to live through brutal, psychological traps. When Matthews' own son is kidnapped and locked in a decaying house with seven other strangers, the detective must race against time to save him. Inside the house, the group, led by Jigsaw’s former apprentice Amanda (Shawnee Smith), discovers that they are breathing a deadly nerve agent, with only a few hours to find antidotes hidden within the building. As they navigate a maze of horrifying contraptions and moral dilemmas, Matthews confronts Jigsaw directly in a tense, cat-and-mouse interrogation. Directed by Darren Lynn Bousman, this gripping thriller deepens the franchise’s exploration of human desperation and twisted morality, delivering relentless suspense and shocking twists that keep viewers on edge until the very end.