Un joven ambicioso y sin escrúpulos (Dennis Price) proyecta vengar la afrenta que la aristocrática familia D'Ascoyne, a la cual pertenece, les ha infligido a él y a su madre. El plan consiste en eliminar a todos los miembros de la familia que le preceden en la sucesión al título de Duque.
In 1922, young pianist and composer Olwen Trevelyan, troubled and sleepless over her inability to finish the final notes of her composition, falls to her death from the cliffs of Cornwall. 25 years on, Olwen has gained posthumous fame as a result of her tragic death and her haunting uncompleted composition 'The Dream of Olwen'. Her reclusive sister Julia (Sonia Dresdel), who has never come to terms with Olwen's death, becomes convinced that Olwen has returned when she meets an amnesiac woman who looks like her.
