Having completed junior high education, Ah-yuan leaves his hometown for Taipei City. With him is Ah-yun, the girl he grew up with. He is 15, but has known Ah-yun for 14 years. In Taipei, they lead a very hard, but happy life. Perhaps there is love fostering between them. They, however, do not perceive it. Then, Ah-yuan is drafted into military service. On the eve of his departure, An-yun gives him 1,096 self-addressed and postal stamped envelopes. She wishes that Ah-yuan would write to her every day during his three-year military service period, in which, there is one leap year. Perhaps Ah-yun is too lonely when Ah-yuan is away, she eventually marries somebody else before Ah-yuan’s return.