Who is the prisoner chained in the castle tower? Lady Guinevere (Guin) Harvey would rather be writing gothic tales of intrigue and adventure than dancing attendance on her sister, the newly married Duchess of Silberwald. Until they arrive at Silverwood Castle, a place of such gothic perfection that Guin is enchanted. Ghostly groans and clanking chains lead her through old, misshapen passages to a cell where she meets the odd but charming Kasimir, who’s kept chained like an animal – and who could be a figment of her vivid dreams, the ghost of a dead, mad prince, or just a political prisoner no one wants to talk about. But the castle holds many secrets. What beast makes such soul-chilling cries in the night? Why does she have such strange dreams whenever she drinks the tea? More than anything, why is she falling so easily under the prisoner’s spell? Guin summons the medium Barbara Darke, but by the time Barbara arrives, Guin can no longer distinguish dream from reality, friend from enemy. Even with all Barbara’s unique talents, they have to face new dangers before they finally discover the terrifying truth.