Mike Church is a Los Angeles private detective who specialises in finding missing persons. He takes on the case of a mystery woman who he calls Grace. She is suffering from amnesia and have no memories of her own. She keeps having nightmares involving the murder of a pianist Margaret, by her husband Roman Strauss in the late 1940's. In an attempt to solve the mystery about these nightmares, Church seeks the help of Madson who is an antiques dealer with the gift of hypnosis. The hypnosis sessions...