Skinny Tiger (played by Michael Mak) and Fat Dragon (played by Sammo Hung) are the best partners in the police station and have made many outstanding achievements. This time, they received news and went to hunt down the drug dealer Prince Tak. Unexpectedly, the fight between the two and Prince Tak accidentally disrupted the wedding of the Deputy Commissioner of the Hong Kong Police Force. Although Prince Tak was finally arrested, the two had to take a temporary leave because they angered their superiors. The two took advantage of their free time to travel to Singapore and accidentally met two local women and became friends. Unexpectedly, Prince Tak was released on bail at this time. In order to avenge his hatred, he specially hired a killer to go to Singapore to find Skinny Tiger and Fat Dragon for revenge. Although the two survived the disaster, they caused two friends to be seriously injured. Since they were suspended from work, the two decided to fight back!