A vineyard owner (David Niven) named Philippe de Montfaucon must return to the family estate in France to deal with some unexpected business. He reluctantly takes along his wife (Deborah Kerr) and two children. They encounter some weird characters, such as Donald Pleasence as a creepy priest, Sharon Tate as Odile, a witch (great performance!), and David Hemmings as her brother Christian, who likes to shoot birds with his bow and arrow. The wife stumbles upon an ancient ritual involving a dozen robed figures-and it turns out that her husband is involved with this cult.
Although the story is a bit uneven and Deborah Kerr is mostly irritating, the movie does have its creepy moments and is worth seeing for the cast alone.
Directed by J. Lee Thompson (BATTLE FOR THE PLANET OF THE APES, HAPPY BIRTHDAY TO ME)