On a cold Valentine's Day, a girl Xiao-Hua runs into a boy A-Wen who is waiting for his lover. Out of empathy, Xiao-Hua hands A-Wen a cup of hot milk tea. The two get to know each other since. On the same day, Zi-Jie Huang also bumps into Xiao-Hua. Zi-Jie behaves like a jolly charming womanizer, which makes Xiao-Hua uncomfortable. There are already frictions between the two at the first sight. Xiao-Hua is convinced that A-Wen's lover must be Yi-Chun, known as Butterfly. Out of surprise Xiao-Hua discovers Yi-Chun cheats on A-Wen with Zi-Jie....
