Inspector Li (Jackie Chan) and his old partner James Carter, who came to Hong Kong from Los Angeles for a vacation (Chris Tucker) There was really a moment of leisure. Because the U.S. Consulate was bombed and two staff members were killed, Inspector Li had to take Carter to visit Deng Liqi (Zunlong), a triad leader and his father's former partner. Deng Liqi's subordinates Hu Li (Zhang Ziyi) and others came forward to attack Li and Carter one after another. Soon, Li was banned by the United States from participating in the case, and the Hong Kong Police Station was also bombed. The separated Li and Carter arrived at Deng Liqi's yacht respectively. They learned that there was an infighting in the Trilateral Association. As soon as they finished speaking, Hu Li shot Deng Liqi to death in the sea... The two men who had temporarily lost clues rushed to Los Angeles and found Hu Li and the American undercover agent at the home of local tycoon Rong Shixun. It turned out that Deng, Hu and others were involved in a huge counterfeit currency case, and Li and Carter decided to take back the printing plate in Hu Li's hand...