A rather low-rent and low-energy Satanic horror... not that there is that much horror. Plenty of Satan though.
The Desard family have been cursed by Demonic forces for centuries. Now the two brothers Andre (John Carradine) and Belial (Lou Chaney Jr) are competing warlords invoking the power of Satan to control the local village and estate. Visiting scientists Dr Mallory (Andrea King) and Dr Campion (Jerome Thor) naturally scoff at such superstitious nonsense.
But the Satanic battle is real, though mostly seems to consist of scantily clad women gyrating and writhing and plenty of calls to Satan. To be honest about 50% of the dialogue of this film is the word "Satan" and there is a lot of dialogue in this film. Actual visual horror is in short supply though the film is undeniably a bit creepy but isn't very scary. And really isn't that good.
