Chon Wang, a clumsy imperial guard trails Princess Pei Pei when she is kidnapped from the Forbidden City and transported to America. Wang follows her captors to Nevada, where he teams up with an unlikely partner, outcast outlaw Roy O'Bannon, and tries to spring the princess from her imprisonment.

The dynamic duo of Chon Wang and Roy O'Bannon return for another crazy adventure. This time, they're in London to avenge the murder of Chon's father, but end up on an even bigger case. Chon's sister is there to do the same, but instead unearths a plot to kill the royal family. No one believes her, though, and it's up to Chon and Roy (who has romance on his mind) to prove her right.