Ingyu, a herbivorous man, who had a business affair with his wife Yerim as he entered the period of boredom, confesses this to Eun-dong, a carnivorous man who is a mentor of his life. Eun-dong, who had nowhere to go due to a business failure, calls his wife Seong-eun as an excuse to solve his problems and sits down like a leech. In the end, In-gyu and Ye-rim seduce Ajou Eun-dong with the secret card of beauty in order to expel the leech-like sister-in-law out of the house.
