The movie tells the love story of swimming prodigy Zhou Xiaoqi and transfer student You Yongci for 15 years. In high school, Zhou Xiaoqi (played by Xu Guanghan) fell in love at first sight with You Yongci (played by Zhang Ruonan), a naive and pure young manLove, the boy silently guards, but the girl leaves without saying goodbye. The following life, a 15 year love journey. Your wedding is also my coming of age ceremony.