They were coming tonight to tell ghost stories. 'A tale to freeze the blood' was the only rule. Switzerland, 1816. On a stormy summer night, Lord Byron and his guests are gathered round the fire. Felix, their serving boy, can't wait to hear their creepy tales. Yet real life is about to take a chilling turn. Frantic pounding at the front door reveals a stranger, a girl covered in unusual scars. She claims to be looking for her sister, supposedly snatched from England by a woman called Mary Shelley. Someone else has followed her here too, she says. And the girl is terrified.