When his brother disappears, Robert Manning pays a visit to the remote country house he was last heard from. While his host is outwardly welcoming – and his niece more demonstrably so – Manning detects a feeling of menace in the air with the legend of Lavinia Morley, Black Witch of Greymarsh, hanging over everything.

Playboy John Carter picks up a woman in a discotheque and takes her home. When she is murdered and he is framed for the crime, he finds himself drawn into a seedy underworld plot.

A physician discovers that two children are being kept virtually imprisoned in their house by their father. He investigates, and discovers a web of sex, incest and satanic possession.