One cold winter, Yin Xiaoxi, a girl with a sunny smile, warmed the heart of the sad Ou Huan. After growing up, Ou Huan decided to look for the good girl of the year. Yin Xiaoxi was also looking for the boy of the year. However, Yin Xiaoxi thought that her classmate Xi Ming was the one. In the end, she got the facts wrong. As soon as she found out the facts, Ou Huan got leukemia again. Xi Ming donated bone marrow to Ou Huan for the person she liked - Yin Xiaoxi.