Kaiji Itou is een nietsnut die zijn dagen doorbrengt met het drinken van bier en het stelen van wieldoppen, totdat hij uiteindelijk wordt misleid door zijn voormalige collega. Niet in staat om de enorme schuld van zijn vriend plotseling helemaal alleen af ​​te betalen, krijgt Kaiji een duistere deal aangeboden om deel te nemen aan een illegale ondergrondse gok op een cruiseschip. Dit blijkt niets meer te zijn dan het begin van zijn nieuwe leven in de hel, waarbij hij halsoverkop in een levensbedreigende achtbaan van denkspelletjes, bedrog en bedrog terechtkomt.

6 people considered "losers" in life begin to live together in a mysterious share house.

Abiko Satoshi is a high school teacher. His life went by smoothly, until a case changed his life.

Oba Sakura is the chief editor of a fashion magazine. She is finalizing a divorce with her husband.

Hata Manta is a retail employee involved with product demonstrations. He considers himself an entertainer, but he is not popular at all.

Mochizuki Mai moved to Tokyo from Hakata. She works at a hostess bar.

Kurumizawa Midori is a civil servant. She is diligent at her job, but she is in mired in debt due to her gambling addiction.

Ikegami Ryuji worked at an advertising agency. He did his job very well, but he was dismissed from his job.

The events of the series revolve around (Umm Mubarak) who suffers from the injustice and injustice of her husband (Abu Mubarak) and his constant insult to her, and the son (Mubarak) who suffers from the influence of bad friends, through his friend (Nasser), who swept him into the world of gambling and drugs, what will be the fate of that family?