Shin Da-mi is devoted both to her work and home. Managing Director Pak at her company is known as a bachelor. Pak is the object of envy of all her female co-workers but he only has eyes for Da-mi. Naive Da-mi gives herself up completely to the affections of Pak thinking that marriage is not far off. But, it turns out that the supposed bachelor has a wife and son. When they show up, Pak dumps Da-mi. Filled with vengeance, Da-mi goes out with the chairman and with his help, she has her revenge on Pak.