Two strangers chained to pipes in an abandoned bathroom and separated solely by a corpse are tortured by a sadistic serial killer; a brilliant and disturbed mastermind places eight people in a horror-filled house where they must try to find a way out or die; Amanda, now Jigsaw's apprentice captures the doctor in order to keep Jigsaw alive for one more game; while investigating the demise of Jigsaw, a police officer is caught in the murderer's torture traps and must depend on two FBI profilers to rescue him; after Jigsaw's death, his apprentice and successor to his killing dynasty kidnaps five people, forcing them to complete a series of tasks in order to survive; Jigsaw exacts his revenge on the insurance executive who denied him experimental cancer treatment; when survivors of previous Jigsaw games gather to seek the help of a self-professed guru and fellow survivor, they discover that he has secrets that bring the Jigsaw legacy back to life.