The two brothers, Yipao and Taipao, are small time con artists. One day they are cheated on their stolen goods when they meet Jia Wudao. When trying to fight him off they become impressed by his skills and ask him to become their master. Later they discover that he is a killer, and a fight breaks out between them where Taipao is killed while protecting his brother. Yipao manages to escape but is now determined to revenge Taipao and start training to be able to defeat his former master. Yipao is played by Yuen Biao, former acrobat and martial artist at Beijing Opera School, along with Jackie Chan and the film's director Sammo Hung, among others.