Hon (Elvis Tsui), Hei, Koon and Bonnie (Kingdom Yuen) are a group of bank robbers who hijacked an armoured truck. Hon and Hei managed to escape from the cops while Koon and Bonnie encounter rookie cop Wong Ka-fai (Aaron Kwok), whom arrests Koon when he fell off his motorcycle. Knowing that one of his accomplices were arrested, Hon bursts into the police station and murders Koon to prevent divulgence of his crimes.