Star Chow is about to be kicked out of the Royal Hong Kong Police's elite Special Duties Unit (SDU). But a senior officer decides to give him one last chance: Star must go undercover as a student at the Edinburgh High School in Hong Kong to recover the senior officer's missing revolver.

Another Quality HK comedy starring Stephen Chow, who has to go back to school undercover as a student so he can find his senior officer's "kind" pistol - kind because he uses its nozzle to scratch his back - and ends up having a difficult time in school as he soon becomes known as an awful student, but as predicted he wins his fellow students over with his charm. The jokes are quite funny, Chow and Tat make a formidable comic team, and Man Cheung gets the temperatures soaring. There's some action, mainly in the beginning and the end. Chow is quite a nifty fighter. Things, however, can get tiring towards the end, but overall a very good comedy with a killer gag scene where Chow calls Tat for answers to his exam and the whole police team help him out.