A fund manager in Hong Kong won the championship in the actual shooting competition and got to know the runner-up and police officer Zhuang. GuanYouBo happened to be robbed by the gun king. He shot four robbers in a row and became a hero in the eyes of the public. In fact, Guan is the mastermind of this matter. Zhuangzi and Wei became suspicious of Guan based on clues, and finally set up a round-up. The story of Gun King begins with a real shooting competition (I.P.S.C). GuanYouBo, the foreign exchange investment manager played by Louis Koo, left with a gun after winning the game, but he happened to be robbed on the way. In order to save a traffic policeman, GuanYouBo shot to stop the robbers from killing the policeman. This righteous act made him a hero in the eyes of the citizens. However, Zhuang Weizi (Daniel Wu), a defeated officer, is also investigating the case, only to find something else. He has all kinds of entanglements in his heart, from doubt to belief. Finally, with the help of Brother Miao (Fang Zhongxin), the fog is solved. In this movie, Louis Koo played the role of "Everyone loves him". Asa, a female nurse with a weak appearance and a strong heart, is crazy about him, and Li Bingbing, a female boss, also has an affair with him. Not only that, his subordinate, Zhuang, a policeman played by You, also has an extraordinary "appreciation" for him.