Yongsoon, an 18-year-old high school student, is a daring, fearless girl who falls in love with the coach of her school’s athletics team. When she discovers that he has a lover, the pain is almost too much for her to bear. To make matters worse, her father brings home a new wife. In an effort to bring about a resolution, Yongsoon tells the coach that she is pregnant with his child and decides to meet his lover to finally settle things. They meet in a classroom, together with the coach and Yongsoon’s new stepmother. Can Yongsoon win back her love? Yongsoon is a peculiar film on growth. Yongsoon’s character is so volatile that, at times, it’s difficult to empathize with her. Sometimes she goes too far to simply be considered a cute, rebellious teenager, and she believes that her desperate defiance derives from her love. However, her attitude towards her father and stepmother suggests otherwise. The more they care for her, the wilder her defiance becomes. Yongsoon is a girl who can only stop after taking things to their extreme conclusion.