The film tells the parallel love stories of a mother and daughter. The story of the mother is told partially in flashbacks.
The movie starts in the present day. The daughter, Ji-hye (Son Ye-jin), is cleaning-up around her house when she comes across a box full of old letters and a diary that detail the story of her mother, Joo-hee (who is also played by Son Ye-jin). Periodically in the movie, Ji-hye reads one of these letters, which starts a flashback scene in which the story of the mother is told. These flashbacks are intertwined with Ji-hye's own story, in which she falls for a fellow student, Sang-min (Zo In Sung), who is involved with the school theater.
