In sixteenth century England, fear of witchcraft abounds. But witches are not the only source of evil, as Dr William Gilbert will discover ... When Dr William Gilbert is caught in an Essex snowstorm, his life is saved by a strange, wolf-like dog. Taken in by the strange family that owns the animal, he is nursed back to health in an eerie, isolated building with a terrible history, where the cries of a child echo through the corridors...