Simon (McAvoy), an art auctioneer, becomes an accessory to the theft of a painting–Francisco Goya ''Witches' Flight''–from his own auction house. When a gang attacks during an auction, Simon follows the house emergency protocol by packaging the painting. The gang's leader Franck (Cassel) then takes the package from him at gunpoint. Simon attacks Franck, who delivers him a blow to the head that leaves him with amnesia. When Franck gets home, he discovers that the package contains only an empty frame. After ransacking Simon's apartment and trashing his car, the gang kidnaps and unsuccessfully tortures him. But he has no memory of where he has hidden the painting. Franck decides to hire a hypnotherapist to try to help him remember.