The gangster Wen Ge (played by Kaohsiung) was being hunted down, and his brother Anan (played by Simon Yam) arranged five people to be his brother's bodyguards and ordered them to find out the people behind the assassination of Wen Ge. The five people are Ah Gui (played by Anthony Wong), Ah Lai (played by Francis Ng), Ah Mike (played by Cheung), Ah Xin (played by Lu Songxian) and Ah Fei (played by Lam Suet). Ah Lai and Ah Xin are well-known masters, while Ah Gui, Ah Mike and Ah Fei are former heroes who have retired from the world: Ah Gui is Wen Ge's former subordinate, Ah Mike is a sharpshooter, and Ah Fei is a firearms expert. The five people worked together to capture the killer and find out the mastermind behind the scenes. The five strangers became close friends. At this time, Anan told Ah Gui that Ah Xin had committed adultery with Wen Ge's wife and asked Ah Gui to kill Ah Xin, but Ah Lai firmly did not allow it. Mike and Fei supported Lai and Gui respectively. Finally, they agreed to solve the problem in a small restaurant. The guns pointed at each other were ready to explode...