Eddie and Tom (Cole and Dylan Sprouse, TV′s "The Suite Life of Zack and Cody") are two 14-year-olds with one thing in common: they both look exactly alike. So when the boys accidentally meet on the set of Eddie′s new movie, they impulsively agree to trade places for the afternoon. But when the production company abruptly leaves the city, Tom and Eddie soon find themselves in deep double trouble when no one believes who they both really are in this fun-filled family adventure, based on a story by Mark Twain.