Secret

Ye Xianglun (Jay Chou), a talented piano player, is a new student at prestigious Tamkang School. He meets Lu Xiao Yu (Gwei Lun-mei), another piano student, and they spend time together, sharing their first kiss after Xianglun gives her a rare music score that won him a school piano battle. However, Xiaoyu suddenly disappears, and Xianglun discovers an unexpected twist: he has fallen in love with a girl from his past life, who had traveled forward in time 20 years to meet him. As the truth unfolds, Xianglun must play a mysterious melody called "Secret" on the piano room's oldest instrument to reunite with Xiaoyu and relive their lost moments together.