Parisian Rita Kato follows a letter from her friend Masao Sato to Tokyo, but discovers that a new tenant is already living at the sender's address, the slacker Takeshi, called Golgo after the contract killer protagonist from Takao Saitō's long-lived manga series Golgo 13. Apathetically, the two squats on each other for a few days until Rita sets off again and is bagged on the way back by the petty criminal Kiyomi in a stolen car. In the Tokyo swampland, the two meet Golgo again...