Still crushed by debt, Kaiji Itou falls back into his reckless old habits until he crosses paths with loan collector Yuuji Endou. Hoping for another chance at gambling his way out, Kaiji instead finds himself captured and sent to an underground labor camp run by the Teiai Group. Forced into harsh conditions alongside countless other debtors, he faces years of grueling labor before earning his freedom. Desperate to escape, Kaiji sets his sights on returning to the surface and risking everything in another dangerous gamble, where temptation, desperation, and survival once again collide.