Trap: Adulterous Woman: Seung-hee lost her parents when she was young and is raised by Joon-seok's father. Years pass and Joon-seok and Seung-hee get married and become a couple. Realizing that he married out of familiarity, Joon-seok meets a new woman. Seung-hee knows that Joon-seok is cheating on her, but she doesn't want to see Joon-seok and her lover happy with each other, so she persists. Seung-hee, who was somber, became acquainted with a photographer she met by chance. The two spend happy days, and Seung-hee decides to divorce him.