Kaiji Ito (Fujiwara Tatsuya), who is already in his thirties, works as a boring convenience store clerk. His desire for wealth is only met with frustration and disappointment. One day, a woman named Endo Naoko (Amami Yuki) leads her men to find Ito and asks him to repay a huge loan shark debt as a guarantor. The strapped Ito is unable to pay off his debts, so he has to follow Endo's advice and board the "Hope" gambling ship to fight hard. But from the moment he boarded the ship, Ito and many other so-called "losers" with the same problem fell into the trap of the huge wealth empire. Ito and his people who failed in the gambling game have since become slaves of the empire, working in underground projects every day, hoping to get rid of debt and return to freedom one day. The empire's supervisor, Tokawa Gen (Kagawa Teruyuki), and others are cold-blooded and use all means to squeeze the value of slaves. Unable to bear the exploitation, Ito finally chose the "brave road" of a life-or-death struggle, and challenged Tokawa Gen with his life as a bet... This film is adapted from the famous manga of the same name.