A young composer and pianist Olwen Trevelyan (Audrey Fildes), troubled and sleepless over her inability to finish the final notes of her composition, falls to her death from the cliffs of Cornwall. As years pass, Olwen's sister Julia (Sonia Dresdel) obsessively keeps her memory alive. The young composer gains posthumous fame because of her tragic death and her haunting, unfinished composition, "The Dream of Olwen." 25 years later, still mourning the death of her composer sister, Julia believes she has returned, reincarnated, in an amnesiac woman who chances upon her house seeking help...