Haruo Sugimura is fresh from serving a two-year stint in prison for assaulting someone when he is recruited by a loan shark named Sakai to help collect money for a company called Minami Hachi Ban Kogyo, baesd in Osaka. Their rates are ruthless: 10% interest is added every 10 days. Their customers are desperate: a hostess who owes money to other loan sharks, a man made suicidal because his family don’t love him anymore. Haruo learns about the art of the loan shark as well as the dark side of peoples personalities.
One day, Chiho is asked to collect the rent from her grandmother, who has a bad leg. Chiho easily agrees and regrets it. The inhabitants of the flat are yakuza, host, robber, alcoholic, etc. They are all scum and they don’t pay the rent.