Curiously solid, little occult psychological thriller that's sinisterly gloomy and consists of a banged-up ensemble cast featuring names like David Niven, Deborah Kerr, Donald Pleasance, David Hemming and Sharon Tate. A wealthy French nobleman returns back to his home town, along with his wife and children to help out with the town's failing vineyard. When there he tries to keep it secret from his wife, but she soon discovers the family tradition of Pagan sacrifice . The professionally classy performances are fitting, especially the support roles with Hemming and Tate really embellishing a creepy presence. Same for a cold-glazed Pleasance. Director J. Lee Thompson's atmospheric touch shows in many frames of this crisp b/w presentation, from the spooky castle, to the watching townsfolk and a disorientating chase scene through the castles nearby forest. It's attractively photographed, where Thompson also goes about providing some frenetic camera angles to lay out the anxiety of the circumstances. Despite some short-lived pockets, tension seems to be replaced by glum atmospherics in what feels like a slow-burn mood piece with a stringently compounded script breathing plenty of mystery and intrigue from that dark secret formula. Some things are not entirely explained, but it gives in to a devilish ending, but it's a very long build up to its foreseeable payoff. Some motions and actions of Kerr's concerned, but caring mother figure were somewhat an irritation. Niven is fine as the man tormented by his ancestral responsibilities, but it doesn't ask too much from him. While Kerr was the opposite with her emotive turn. The music score is melodically haunting in its angelic cues. A wickedly sleepy black mass thriller.

"Drive out of this valley. Never come back.".