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.

An imprisoned swordsman is accused of killing three men. He probably would have already been executed for his crimes but is kept alive because he knows the whereabouts of hidden gold.

Leung Cheng-Yee is a successful architect who is mistakenly involved in a complex and vicious murder plot. After his wife is murdered and his life turned completely upside down, Leung decides to seek a bloody vengeance himself.

Despite negative psychological evaluations, Mike Wong is assigned as the captain of the SDU, a special task force linked to the Customs Department. Their mission: apprehend nasty drug dealers, led by the “Ice Queen.” To do this, Mike has to team up with customs cop Minnie. Despite their clashes, the two learn to understand each other, but not before things get bad.

Cheung Ye Pang (Andy Lau) is a Cantonese detective out to combat opium sellers. Encountering high-level corruption along with close friends being murdered, Pang sets out to stop the dealers.

Li Tzu-Liang is returning to Hong Kong with the ashes of his wife. He now has to bring up his two sons on his own. Though he is quite well-off, he his plagued by debts and when he loses a large sum of money betting on horses, he has to turn to dangerous loan-sharks. Here starts a spiral which gets him and his two sons deeper and deeper into trouble.

A blundering Hong Kong police inspector, Ma Yu Long, goes under cover to investigate a high-class businessman, Teng Kuo Chiao, who was bribing city planning officer Ma Yu Yu to build roads to suit his needs and is suspected to be liable in Yu's death. In the meantime, Long courts Yu's high school sweetheart, Julia, who wants the inspector to cheat Chiao out of some money as part of the revenge deal.