Ann Forrester came to Rosevean, a gloomy Gothic mansion, as the personal assistant to its iron-willed mistress, Mrs Pendine. At first Ann's duties were routine. Suddenly she realized that Rosevean was a house riddled with jealousy, secrets and menace. But it wasn't until Mrs Pendine's strange death that the tentacles of Rosevean reached out to Ann herself, strangling her slowly and surely in its fatal grip . . .