Curator Harry Deane (Colin Firth) is an expert in fine art, but he's equally accomplished in taking abuse from his insolent boss Lionel Shabandar (Alan Rickman). That's about to change. The plan, trick the avid art collector into buying a fake Monet painting. To assist in the heist, Deane hires rowdy Texas cowgirl P.J. Puznowski (Cameron Diaz) to help him fool the richest man in England. But as the plan begins to unravel, Deane finds he is falling in love with the rodeo Queen, ensuing further complications.