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.

Cast:Robert Hardy, Shane Briant, Gillian Hills, Yvonne Mitchell, Paul Jones, Patrick Magee,

Genre:Horror, Thriller,

country:United Kingdom,

Production:Hammer Film Productions, Anglo-EMI, Frank Godwin Productions,