Wheatley was overjoyed by the company's filming of his novel THE DEVIL RIDES OUT (1968), but was apparently less pleased with Hammer's version of his popular TO THE DEVIL A DAUGHTER novel which Hammer had considered adapting for the screen as early as 1963. TO THE DEVIL A DAUGHTER was Hammer's final horror film and the company's second attempt to bring one of Dennis Wheatley's occult novels to the screen. Henry who was forced into the cult's evil-doings because his wife was a member of the cult attempts to recant and places his daughter in the care of occult novelist Jim Verney (RICHARD WIDMARK) who must confront and destroy Rayner before he succeeds in making the devil walk the Earth in the form of an innocent girl. Rayner intends to fulfil his old ambition and rebaptise Catherine into the service of evil. Rayner sends his godchild Catherine Beddows (NASTASSJA KINSKI) to England to join her father Henry Beddows (DENHOLM ELLIOT) for her 18th-birthday. Twenty years on and Rayner has settled in Germany with his devil-worshiping followers under the facade of the 'Children of the Lord' cult.
*POSSIBLE SPOILERS* Father Michael Rayner (CHRISTOPHER LEE) was ex-communicated from the Church of England for attempting to bring a personification of the devil to Earth.