The will of a stranger - this begins many troubles, but the life of a governess is not replete with joys, so Miss Murray did not doubt a moment whether it was worth accepting a house on Main Island, as well as a modest, but state. She was not alarmed by the strange condition: within a year the heiress is obliged to live in a mansion without leaving the island. Free cheese happens only in a mousetrap, and the walls of an old building hide terrible secrets. Miss Murray is far from the first owner of the house, with the remains of sinister Cronk Castle visible from her windows. A black ghost dog portends trouble, but darkness in human souls poses a much greater danger. Yet what lies ahead for Ms. Murray is not just danger, but an important meeting that could change her life.