Simon (James McAvoy), a fine-art auctioneer, joins a gang of thieves led by Franck (Vincent Cassel) to steal a priceless Goya painting. During the heist Simon suffers a head injury and awakes with no memory of where he hid the artwork. When torture and physical threats fail to break through his amnesia, Franck hires a hypnotherapist named Elizabeth (Rosario Dawson) to find the answer. But as Elizabeth probes the recesses of Simon's mind, the lines between truth and deceit start to blur.