A series of grisly murders bearing the unmistakable hallmarks of the Jigsaw killer brings terror to the city. The murders peak the interest of law enforcement as they're confronted with the chilling possibility that John Kramer, the man known as Jigsaw who died a decade ago, could be operating from beyond the grave. Detectives Halloran and Hunt find themselves racing against time to piece together the clues and end the new wave of horror. New victims are discovered, each meeting their demise in elaborately orchestrated traps that force them to face their deepest fears and sins. As the body count rises, the mystery deepens, questioning whether they're chasing a new apprentice, copycat, or something far more sinister.

Meanwhile, a separate but intertwined narrative features a group of individuals awakening with metal buckets on their heads, connected by chains to a wall that is slowly pulling them toward a gruesome fate. They must decipher the rules of the sadistic game they've been thrust into if they hope to survive. Unraveling why each of them was chosen becomes just as important as the physical escape from the entrapments that threaten their lives. With each trial designed to test their morality and willpower, the characters grapple with their past actions and the consequences that have led them to this point of desperation and confrontation with death.