Given the question: Build a movie plot around this: Why does Chon Wang travel to New York? To find his old partner Roy O'Bannon
The answer is:
In 1887, Chon Lin (Fann Wong) is drinking tea with her father (Kim Chan), the Keeper of the Imperial Seal of China, in the Forbidden City. She tells him her brother, Chon Wang (Jackie Chan), is doing well as a sheriff in Carson City, Nevada, but her father replies that her brother is dead to him. At that moment, Lord Nelson Rathbone (Aidan Gillen), leads a band of Boxers into the city, who attack the Keeper. Despite Lin's efforts, her father is killed and the seal is stolen. With his last breath, he gives Lin a box and tells her to give it to her brother.Meanwhile, Chon Wang is doing well as sheriff, having captured an impressive array of fugitives. His deputy is relaxing with a book called "Roy O'Bannon Vs. The Mummy", a highly fictionalized account of the events of the first film that now portrays Wang's "Shanghai Kid" as a cowardly sidekick, which Wang is dismayed. Wang receives a parcel, which contains the puzzle box and Lin's letter, telling him their father is dead and that she has tracked the murderer to London.Chon Wang travels to New York City to find his old partner Roy O'Bannon (Owen Wilson), needing his share of the gold left over from the first film to buy his ticket. Roy has left his brief stint in law enforcement, broken off his romance with Falling Leaves, spent most of the gold investing in the Zeppelin (in truth, he lost all of the gold on his novels), and is now a hotel waiter and part-time gigolo. After they attempt prostitution to pay for a trip to the United Kingdom, the Mayor of New York arrives in search of his daughters, Roy's latest clients. Chon Wang fights off a number of New York police officers, and he and Roy ship themselves to London in a crate. On the way, Wang tells Roy about his father, and Roy swears an oath to help reclaim the seal.In London, Wang and O'Bannon have their duster and watch stolen, respectively, by a number of street thugs including a young boy named Charlie (Aaron Johnson). After an extensive battle to reclaim these items, they are arrested by the police....