As a deadly battle rages over Jigsaw's brutal legacy, a group of Jigsaw survivors gathers to seek the support of self-help guru and fellow survivor Bobby Dagen, a man whose own dark secrets unleash a new wave of terror.

Ben Campbell is a young, highly intelligent student at M.I.T. who strives to succeed. Wanting a scholarship to transfer to Harvard School of Medicine to become a doctor, Ben learns that he cannot afford the $300,000 tuition as he comes from a poor, working-class background. But one evening, Ben is introduced by his unorthodox math professor to a small but secretive club of five students, Jill, Choi, Kianna, and Fisher, who are being trained by Professor Rosa to count cards at blackjack.

As a deadly battle rages over Jigsaw's brutal legacy, a group of Jigsaw survivors gathers to seek the support of self-help guru and fellow survivor Bobby Dagen, a man whose own dark secrets unleash a new wave of terror.

Detective Matt Gibson chases the psychotic Detective Mark Hoffman while Jigsaw's widow Jill Tuck tries to kill him as assigned by her husband. However he escapes and Jill meets Gibson and offers to sign an affidavit listing the murders committed by Hoffman. In return, she requests protection. Meanwhile, the prominent Jigsaw survivor and leader of a support group Bobby Dagen is abducted with his wife and friends and forced to play a mortal game to save himself and his beloved wife.