Great art has its protectors every day in the major museums. Three guards are more than dedicated to the job they do. Their museum brings in modern work that has no appeal to the guards, and the museum authorities plan to sell the classic pieces, sending them elsewhere in the world. When Roger (Christopher Walken) and George (William H. Macy) and Charles (Morgan Freeman) find their long-beloved work transplanted to Europe, they not only miss their favorite art pieces, but they make plans to steal the works with which they have become obsessed. Roger becomes the mastermind of an inside plot to perform the biggest art heist in the history of their museum.