Seong-sik became stays at home while his workaholic wife Hye-joo works. Next to them, Seong-ki's friend Joon-seok and his wife move in. Seong-sik learns how to do housework from his friend's wife Eun-yeong. At first they hit it off but that soon turns into an affair and when Joon-seok and Hye-joo find out, they also start cheating on their spouses....