In Fight Back to School 3, Chow Sing-Sing is tasked with infiltrating a gang of diamond thieves. His assignment leads him to marry the gang leader's daughter, played by Anita Mui, in order to get closer to his target.
As Chow tries to balance his undercover work with his relationship with his fiancée, he becomes embroiled in a series of comedic mishaps and dangerous situations. Along the way, he must also contend with the gang's violent henchmen, a nosy neighbor, and a group of bumbling police officers who bungle his plans at every turn.
Despite the challenges, Chow manages to outwit the gang and bring them to justice, proving once again that he is a skilled and resourceful cop. Along the way, he also learns the value of love and how to balance his personal and professional lives.
