Kaiji Itou is a lazy slacker who spends his days drinking beer and stealing hubcaps—that is, until he is duped by a former coworker. Kaiji, unable to repay his friend's massive debt on his own, is offered a dubious deal to engage in an illegal underground wager aboard a cruise liner. This turns out to be the start of his new hellish life, as he is plunged headlong into a life-threatening roller coaster of mind games, cheating, and deception. Gyakkyou Burai Kaiji: Ultimate Survivor is based on the first installment of Nobuyuki Fukumoto's popular gambling manga series, and follows our unlucky protagonist as he is forced to combat not only other individuals, but also the secrets of their psyches. Kaiji discovers he hard way that the worst sides of human nature surface when people's backs are against the wall, and that the most fearsome dangers of all are greed, paranoia, and the human survival instinct itself.