Lao Wang (Simon Yam), Xue Ling (Cheng Yuling), Long Ge (Bryan Leung) and Uncle Da (Ng Man-tat) are all anti-drug police officers. They fought side by side, shared hardships and formed a deep friendship with each other. One day, they took down a drug den, but the drug dealer leader escaped. After that, the drug dealer leader killed Long Ge. The others vowed to find the drug dealer leader and avenge Long Ge. One day, Ah You (Jacky Cheung) accidentally discovered that Uncle Da was in cahoots with drug dealers and took a video as evidence. Ah You told the trusted A Dan (Donnie Yen) and Lao Wang about this. Who knew that Lao Wang and Uncle Da were in the same group? In order to erase the evidence, Lao Wang killed A Dan and framed Ah You. Ah You's girlfriend A Mei (Irene Wan) found the fatal videotape. In order to save Ah You, A Mei also died in Lao Wang's hands, but it also exposed Lao Wang's hidden feet.