This is a gritty, well-directed look at the people many pretend not to see, but it's impossible to look away when they're played by actors as good as Audrey Tautou and Chiwetel Ejiorfor. Stephen Frears ('High Fidelity,' 'Mrs. Henderson Presents') proves there's no genre he can't master, and Sergi Lopez ('Pan's Labyrinth') demonstrates a particular talent at playing a chilling villain.