A kid from South Boston obsessed with kung fu movies (Michael Angarano) is given a staff that transports him to ancient China. There he joins forces with drunken master Lu Yan (Jackie Chan) to confront the Jade Warlord, return the staff, and thus free the Monkey King. Along the way, he and Lu are aided by a monk (Jet Li) and an orphaned warrior out for vengeance (Yifei Liu).
The meeting of Jet Li and Jackie Chan delivers on its hype. The story is epic and well paced, the characters and their motivations rich. One of the best American kung fu movies I've seen.