Kaiji Itou, an apathetic traveler, finds himself in a predicament as one of his co-workers fails to repay a borrowed sum. Debt collectors demand payment, but Kaiji lacks the resources to settle it. Desperate, he is presented with an opportunity to board the luxurious Espoir, with the promise of eradicating all debts upon completion of one night there. Unknown to him, the stakes are higher than a mere game of chance. The contest becomes a thought-provoking spectacle, where the vanquished end up indebted for life. Kaiji needs to act cautiously, navigating through the game with precision and selecting allyship carefully. Nevertheless, the gambling escalates, leading Kaiji on a challenging journey that tests both his mental fortitude and will to endure.