Jeff is an anguished man| who grieves and misses his young son that was killed by a driver in a car accident. He has become obsessed for revenge against the man andreckless with his wife and daughter. When Dr. Lynn Denlon| who has troubles with her marriage| is abducted by the deranged Jigsaw's apprentice Amanda| she is broughtto a gruesome warehouse to keep John Kramer alive in spite of having a terminal brain tumor. Amanda puts a necklace gadget full of explosives around Dr. Lynn's neckconnected to John Kramer's life support system| and tells her that if he dies the device will explode. Meanwhile| Jeff is submitted to a sick game of forgivenesswith surprising dark consequences.