In the English village of Midwich, the blonde-haired, glowing-eyed children of uncertain paternity prove to have frightening powers.

In Victorian England, the uncle of orphaned niece Flora and nephew Miles hires Miss Giddens as governess to raise the children at his estate with total independence and authority. Soon after her arrival, Miss Giddens comes to believe that the spirits of the former governess Miss Jessel and valet Peter Quint are possessing the children. Miss Giddens decides to help the children to face and exorcise the spirits.