"Top "killer" Zhou Quan (played by Andy Lau) accidentally exchanged identities with a lonely walk-on Chen Xiaomeng in bathhouse because of a soap. After Zhou Quan lost his memory, he started to live like Chen Xiaomeng and got to know a media director Li Xiang (played by Wan Qian), while Chen took over Zhou's place and became a killer reluctantly. A series of ridiculous stories started from here and they started to take a look at themselves and "change a way of living" too. The killer reached the bottom and examined at his love and life again, the walk-on pretended to be a killer and reshaped his life. "...