A 19th century Western. Chon Wang (Jackie Chan) is a clumsy Imperial Guard to the Emperor of China. When Princess Pei Pei is kidnapped from the Forbidden City, Wang feels personally responsible and insists on joining the guards sent to rescue the Princess, who has been whisked away to the United States. In Nevada and hot on the trail of the kidnappers, Wang is separated from the group and soon finds himself an unlikely partner with Roy O'Bannon (Owen Wilson), a small time robber with delusions of grandeur. Together, the two forge onto one misadventure after another.