Harry Deane (Colin Firth) is a man with a plan. Art curator for media tycoon Lord Lionel Shahbandar (Alan Rickman), Harry devises an elaborate plot to con Shahbandar into purchasing a fake Monet painting. With the help of beautiful rodeo queen PJ Puznowski (Cameron Diaz), the pair hatch a scheme to fool Shahbandar into believing that Harry's expert forgery is the real deal and pocketing a hefty sum in the process. But with the con proving harder to pull off than he had first intended, Harry and PJ find themselves in increasingly hilarious situations in order to see the job through to the end.