Alain Delon stars as Pierre, an amnesiac recovering from a car accident. He can't remember any details about the accident or about his past life as a wealthy businessman based in the orient. He is currently being nursed back to health on his palatial estate in the french countryside by his beautiful wife, Christiane (Senta Berger), the family doctor (Sergio Fantoni), and a manservant named Kim (Peter Mosbacher).Paranoia rapidly sets in as he begins to suspect Christiane is not really his wife and that he is the victim of a sinister plot.