Yeonmin (played by Jun Ji-hyun) communicated with an officer under a false identity. They used the very old method of pigeon messaging, and Yeonmin enjoyed it very much. In fact, the officer had already seen through her lies and kept in touch with Yeonmin. The correspondence had lasted for 5 years, and when the two were about to meet, Yeonmin did not show up. The officer, who was very sad, returned to the town where he lived when communicating with Yeonmin, looking for each other's bits and pieces. During this period, pigeons often sent him words of encouragement. Later, he met a girl in a bookstore, and the feeling of déjà vu confused him. Before leaving, he came to the bookstore again and told the girl about his loss and sadness. Many years later, he saw the book "White Valentine's Day" and understood the true identity of the girl in the bookstore.