Since her birth, Ah Xun (Chen Yi Rong) have been suffering from a heart disease that makes her unable to do a lot of activities. Thus, she is picked on by all her schoolmates, except for Qing Chuan (Ambrose Hsu).
However, Qing Chuan and his family are moving to America, so he gives her a glass bottle filled with a piece of lavender as a token that he will never forget her, and promises that he will return on Ah Xun’s 20th birthday. Unexpectedly, Chuan comes back as Leo, a famous singer but seems to have forgotten about her.