Chow Sing Sing is about to be kicked out of the Royal Hong Kong Police's elite Special Duties Unit. 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.
周星馳
as Chow Sing Sing
吳孟達
as Tso Tat Wah
張敏
as Miss Ho
張耀揚
as Teddy Big
黃炳耀
as Scissor Legs
黃子揚
as Detective Wong
黃一山
as Turtle Wong
秦沛
as Mr. Lam Cho-Tung
苑瓊丹
as Ms. Leung
陳國新
as Mr. Cheng
曾近榮
as Chemistry Teacher
梁十一
as Johnny
