Follows two teenagers, childhood best friends, who reunite for a summer on a small rural island in Korea.

High school student Yun-ji harbors a secret romance with her homeroom teacher, which results in a pregnancy. When the teacher abruptly disappears, Yun-ji decides to end the pregnancy. To buy illegal abortion pils, she leaves school early. Meanwhile, Kyung-sun discovers that her savings have vanished and sets out to track her down.