Vineyard owner marquis Philippe de Montfaucon is called back to his castle Bellenac because of another dry season. He asks his wife and children to remain in London, but they still come after him. His wife Catherine de Montfaucon soon discovers that her husband is acting mysteriously and that his employees are following old pagan rituals that call for the life of the marquis himself to save the crops.
Look at her long enough and she may be the last thing you'll ever see!
Sidney J. Furie and Michael Anderson (I) were originally approached to direct the film.
Originally Kim Novak was cast in the role of Catherine de Montfaucon. Filming began in the fall of 1965 in France. Near every scene had been filmed when Kim Novak fell from a horse and wasn't able to complete her scenes. Deborah Kerr was hired to take over and every scene that featured Miss Novak had to be re-shot with her replacement.