Covering a period of 25 years, the story concentrates on the reclusive Julia (Sonia Dresdel), who has never come to grips with the fact that her sister Olwen (Audrey Fildes) committed suicide. Each year on the anniversary of Olwen's 'disappearance', Julia has regaled the citizens of Cornwall with a sacrament-like radio broadcast of the poem Olwen was writing at the time of her demise. When a young woman who dimly resembles Olwen arrives on the scene, Julia becomes convinced that her sister has returned from the Beyond, leading to a series of mystical events, romantic encounters and tender reconciliations.