It's vacation time for Det. James Carter(Chris Tucker) and he finds himself alongside Det. Lee(Jackie Chan) in Hong Kong wishing for more excitement. While Carter wants to party and meet the ladies, Lee is out to track down a Triad gang lord who may be responsible for killing two men at the American Embassy. Things get complicated as the pair stumble onto a counterfeiting plot by L.A. crime boss Steven Reign(Alan King) and Triad Ricky Tan(John Lone), an ex-cop who played a mysterious part in the death of Det. Lee's father. Throw in a power struggle between Tan and the gorgeous but dangerous Hu Li(Ziyi Zhang) and the boys are soon up to their necks in fist fights and life-threatening situations. A trip back to the U.S. may provide the answers about the bombing, the counterfeiting, and the true allegiance of sexy customs agent Isabella(Roselyn Sanchez). Then again, it may turn up more excitement than Carter was looking for during his vacation.