Roderick and Pamela Fitzgerald, siblings from London, stumble upon an abandoned mansion on the Cornish coast while on holiday. Enchanted by its beauty, they decide to purchase the house despite its decrepit state. Shortly after moving in, they experience inexplicable phenomena such as mysterious sounds and cold drafts. They learn from the locals that the previous owner’s daughter, Stella Meredith, retains a strong emotional tie to the house because her mother, Mary Meredith, died tragically there.

Determined to uncover the truth behind the disturbances, the siblings dive deeper into the house’s history. Stella’s guardian and grandfather, Commander Beech, forbids her from visiting the house, adding to its mystique. Investigations reveal a complex web of familial secrets, romantic entanglements, and tragic events, leading to unsettling revelations. Their search escalates tensions and sparks a series of confrontations that begin to peel back layers of hidden truths about Mary Meredith’s death—a mystery pivotal to the chilling occurrences in the house.