Jeff is an anguished man who grieves and misses his young son that was killed by a driver in a car accident. Reckless with his wife and daughter, he has become obsessed for revenge against the man. When Dr. Lynn Denlon, who has troubles with her marriage, is abducted by Amanda, the apprentice to the deranged maniac, Jigsaw, she is brought to 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 neck connected 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 forgiveness with surprising dark consequences.