Hongo plays Matsuda Goro, a penniless con man who has lived his whole life alone. The film is a black comedy. One day, the penniless Matsuda Goro sets his sights on the wealthy and well-behaved Sasaki family, and sneaks into the Sasaki family under a false identity to become a first-class tutor. With his unique sweet talk, Go successfully infiltrates the Sasaki family. However, the Sasaki family is a criminal family, and everyone is better at theft, fraud, and extortion than Go. When his true identity is soon exposed, each family member threatens him that they will expose him if he does not cooperate, so he is forced to live a double life as a criminal. In this way, Go is involved in the criminal activities of each family member, but also unknowingly helps to rebuild the family.