Inspector Lee (Jackie Chan) and his old partner James Carter (Chris Tucker) who came to Hong Kong from Los Angeles for vacation are really busy. Because the US consulate was bombed and two staff members were killed, Inspector Lee had to take Carter to visit the triad leader and his father's former partner Deng Liqi (Zhun Long). Deng Liqi's subordinates Hu Li (Zhang Ziyi) and others attacked Lee and Carter one after another. Soon, Lee was banned from participating in the case by the United States, and the Hong Kong police station was also bombed. The separated Lee and Carter came to Deng Liqi's yacht separately and learned that the triad had an internal conflict. As soon as the voice fell, Hu Li shot Deng Liqi in the sea... The two who temporarily lost the clues rushed to Los Angeles and found Hu Li's traces and American undercover agents in the home of the local tycoon Rong Shixun. It turned out that Deng, Hu and others were involved in a huge counterfeit case. Lee and Carter decided to take back the printing plate from Hu Li...