Sing Sing (Stephen Chow) is a star member of an elite special police forces unit.
However, he has something of an attitude problem. When one day he quips to his boss that he ought to be reassigned to traffic control duties, she decides to do just that, demoting him to the rank of constable in the process.
Directing traffic proves to be as unrewarding as he feared it might be, so Sing Sing decides to try to restore his credit with his former unit. His plan involves quitting the force so he can go undercover at a school to help take down an arms smuggling ring.
Once back at school, he is reunited with old friends and foes, including the beautiful school counselor Miss Ho (Sharla Cheung) and the blunder-prone detective Tso Tat Wah (Richard Ng), who has also been assigned to the case.
“Fight Back to School II” is a 1992 comedy action film directed by Gordon Chan.