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.
Chow Sing Sing
Tso Tat Wah
Miss Ho
Teddy Big
Scissor Legs
Detective Wong
Turtle Wong
Mr. Lam Cho-Tung
Ms. Leung
Mr. Cheng
Chemistry Teacher
Johnny
Siu Yiu
Officer Wong
Annie
黃小龜之祖母
Student
