After being rejected from the police college, Qin Feng (Liu Haoran) goes to Bangkok for a vacation. He plans to spend time with his "uncle" Tang Ren (Wang Baoqiang) who is reputed to be the number one detective of Chinatown in Bangkok. Tang Ren turns out to be a sleazy petty swindler who happens to be an underling of local incompetent police sergeant Kon Tai (Xiao Yang). Meanwhile, the main suspect in a local gold robbery case, Sompat, is murdered and the gold goes missing. The gold belongs to prominent local gangster Mr. Yan (Chin Shih-chieh). Kon Tai and his rival in the police department, the ambitious Huang Landeng (Chen He) are put into competition to solve the crime with the person who solves the crime and retrieves the gold to be appointed the next deputy Chief.