Robert Woods

When a trio of free-spirited young women insists on spending the night in a castle rumored to be owned by the Devil himself, their cobweb-and-candelabra lark triggers a nightmare of lust, violence, vampirism, and Satanic seduction.

Ranch owner MacGregor has seven sons and oldest Gregor leads his brothers to Las Mesas, a small town where they want to sell horses. They get into trouble with local people who are related with evil Santillana. After getting imprisoned and losing their horses they decide to go after Santillana's gang.