The movie is a heart-warming tale about the 15-year love story between Zhou Xiao Qi (Greg Hsu), a swimming student and You Yong Ci (Zhang Ruo Nan), a transfer student. In high school, Zhou Xiao Qi fell in love with You Yong Ci at first sight, only for her to leave suddenly without saying goodbye. 15 years later, they meet again. Zhou Xiao Qi wonders if he still feels the same way for You Yong Ci, and whether his love for her still remains the same.