Drugged and disoriented, Shinichi Gotou awakens in a small cell within a private prison. Despite his pleas, the guards refuse to reveal who abducted him or the reason for his captivity. As time passes, his enforced isolation gradually erodes his sanity. He channels his energy into training his mind and body, preparing for the day he can exact his revenge. Ten years later, Shinichi is finally released. Upon escaping, he finds a world that has changed significantly. His prolonged imprisonment severed his ties with society and denied him the ordinary life he had wanted. Having nothing left to lose, he sets out to hunt down the person responsible. However, it appears that the mastermind behind Shinichi's imprisonment is not finished with him, initiating a twisted game where only the victor survives.