The chilling and relentless Jigsaw killer returns to terrorize the city once again. When a gruesome murder victim emerges with unmistakable traces of Jigsaw's sinister methods, Detective Eric Matthews is thrust into a high-stakes investigation. To his surprise, apprehending Jigsaw seems almost too easy, but what he doesn't realize is that being caught is merely another piece of Jigsaw's intricate puzzle.
Michael manages to free himself from Laurie Strode's trap to resume his ritual bloodbath. As she fights for her life from injuries from their last encounter, she inspires her daughter Karen, her granddaughter Allyson, and all of Haddonfield to rise up against the unstoppable monster.
The Freeling family move in with Diane's mother in an effort to escape the trauma and aftermath of Carol Anne's abduction by the Beast. But the Beast is not to be put off so easily and appears in a ghostly apparition as the Reverend Kane, a religious zealot responsible for the deaths of his many followers. His goal is simple - he wants the angelic Carol Anne.
After learning that one of their victims, Maya, is still alive, The Strangers return to finish the job. With nowhere to run and no one to trust, Maya soon finds herself in a brutal fight for survival against psychopaths more than willing to kill anyone who stands in their way.