For a girl with only a hundred days left to live, what would she do with her 100 days? For Fei Yang, she would live her life to the fullest each and everyday. Having learned that she inherited the same disease that killed her father, she decided to forgo treatments and live out the rest of her short but carefree life in Shanghai. In this city, she meets Xu Feng. She soon fell in love with him, and decided to spend her last days with him. But as her disease worsens, how much more days of life will she have to spend with Xu Feng?