This more than slightly familiar scenario doesn't give the principals much scope for acting.

director Nimrod Antal settles for a more generic horror-ride as the imperatives of stalk-and-escape take hold. For a while, though, this is first-rate second-hand material.

Kit out the Bates Motel with surveillance cameras, replace Anthony Perkins with the ineffectual Frank Whaley, and you'd have the location for this irritatingly cheapjack snuff-horror thriller, starring Luke Wilson and Kate Beckinsale as a depressed couple

Every unsettling knock, ominous shadow, and piercing flash of light is there to yank us into the panic and dread that rushes through Amy and David’s bloodstream like snake venom.