Fact1: Duncan and adult daughter From pursue friendship with Myles and Paula point, Fact2: Paula is disturbed by level of attention being paid to them, Fact3: Myles is honored to be considered friend by Duncan, Fact4: Myles ensuing change in personality is noticed by Paula, Fact5: Abby 's death sparks in Paula further suspicion of Roxanne
Output: Myles Clarkson Alan Alda, long ago frustrated in his hope for a career as a pianist, is now a music journalist and interviews Duncan Ely Curd Jurgens, perhaps the worlds greatest virtuoso on the instrument. At first annoyed with Myles presence, Duncan soon takes notice that Myles hands seem perfect for the piano. From that point, Duncan and his adult daughter, Roxanne Barbara Parkins, strongly pursue a friendship with Myles and wife Paula Jacqueline Bisset. Paula does not much like Duncan and especially dislikes Roxanne. While Paula is disturbed by the level of attention being paid to them, Myles is honored to be considered a friend by Duncan, who is dying of leukemia. Unbeknown to them, Duncan and Roxanne are Satanists. As Duncans physical body nears its end, father and daughter perform an occult ritual that transfers Duncans consciousness into Myles body. Myles ensuing change in personality, which includes his now being able to play the piano as well as had Duncan, is noticed by Paula, but she is initially unsuspecting of the cause. Though confused by the change in her husband, she also finds his new persona exciting and attractive. Myles soon is pursuing a career as a pianist, and is so successful that he is able to take over Duncans concert schedule. Paula has a nightmare in which she envisions Duncan telling her that he must kill Abby, the preadolescent daughter of Myles and Paula. Duncan tells her that he doesnt want to harm the girl, but that his Master has insisted upon it as part of the bargain. Immediately after the dream, in which a blue substance is placed on Abbys forehead, Paula finds the blue substance actually on her daughters skin. Abby takes ill and dies. Abbys death sparks in Paula a further suspicion of Roxanne. As Myles seems to drift away from her into his new career, Paula investigates Roxannes background. This includes visiting Roxannes exhusband, Bill Bradford Dillman, and a romantic relationship begins to form between the two. Paula eventually becomes fully convinced that Duncan and Roxanne struck a deal with Satan to enable them to pursue an incestuous relationship with one another, that they have placed Duncans consciousness into her husbands body, and that they are responsible for Abbys death. Paula falls asleep and Bill dies in an apparent accident, though he has the same blue substance on his forehead. Paula nearly meets a similar accidental fate which leaves her certain that Roxanne and Duncan in Myles body killed Bill and fearful that they will continue to try to eliminate her. She resolves that, regardless of who the man inhabiting her husbands body truly is, she wants to be with that man. As a result, she turns to Satanism and strikes her own bargain with the devil. She then attacks Roxanne, knocks her unconscious, and employs the same dark magic that Duncan and Roxanne had used against Myles. Paula transfers her own consciousness into Roxannes body, leaving her own body dead in the bath, an apparent suicide. In Roxannes body, Paula returns to DuncanMyles, who happily informs her of Paulas suicide. Without telling him who she really is, she embraces him, enthralled with the excitement of the beginning of their new relationship.