In-ho, a successful businessman at a young age, seems to be good to his wife, Mi-yeong, but in reality, he is having an affair by sponsoring 20-year-old Soo-ji. One day, when Mi-yeong visits her parents' house, In-ho takes advantage of it and calls Soo-ji to invite her to his house. However, Mi-yeong suddenly returns home and is deeply hurt when she sees the two sleeping in the same bed. By the time she decides to divorce her husband despite his affair, she accidentally gets close to Min-woo, Soo-ji's boyfriend.