Set in Shanghai, the film revolves around a series of funny stories following a policeman named Liu Meili as he infiltrates a group of gangsters.

Set in Shanghai in 1946,it is a story about a bumbling police officer Liu Meili who goes undercover in a notorious Shanghai crime gang. He falls in love with a beautiful gang member Yoyo and only manages to draw near to his objective by a combination of blind stupidity and luck.—anonymous