In the future, a rogue cop uses the Power Glove, a device that gives its wearer super powers, to further a malicious agenda leading to a clash between the forces of good and evil.

Cantonese pop star Ronald Cheng stars as spoiled rich kid Dragon Lung, who spends his days idly loafing with his fellow teenaged trust-fund brats, Sue-hei (Sam Lee) and Gold (Tat-ming Cheung). When the trio's frustrated fathers force their sons to attend a police academy for some much-needed discipline (or else face the loss of their hefty inheritances), the would-be cadets bungle their way through boot camp in a series of madcap, gun-fueled hijinx.

TC Lee, a senior policeman whose mounting debts are making headlines in the local press. Lee's not the only person in trouble at his police station, where a handful of colleagues are paying off the bank or worse, are becoming locked into repayments to gangland debt collectors. When Lee and his colleagues become caught in the loan sharks' spiraling interest charges and organized pressure tactics, they become vigilantes and fight back.

In this prequel to the original, a bloody power struggle among the Triads coincides with the 1997 handover of Hong Kong, setting up the events of the first film.

Ying is a single parent who's having a tough time disciplining his wild teenage daughter Ellen.

Although Chicken does not make an appearance, Chan Ho Nam finds a new love interest in the form of Mei Ling. Meanwhile, Tung Sing returns to cause trouble again for Hung Hing, in the form of new leader Szeto Ho Nam.

Tung Tung just graduated from the police academy, encountering a Vietnamnese assassin on his first day on work. Tung in order to break through obstacle in his mind decides to join SDU. Among the teammates, Coolman feels resentment toward Tung, which he doesn't understand. Later he discovers Coolman is actually his step brother. Tung actively tries to get close to Coolman, but is rejected. When training reaches its last stage, Coolman and Tung's team reencounters the Vietnamnese assassin on a deserted island.