I thought that Satan's Blood was a very good Spanish horror film. The film is about an urban couple living in Madrid, called Andy and Thelma, they leave their apartment for a day around the city. In Madrisd They meet another strange couple called Bruno and Anne, who invite them to their country estate. There is a bad storm in the evening, so they stay overnight. The couples have a bit of harmless fun with spirits by a Ouija board, but soon the past comes back to them. Thelma had an affair with Andy's brother, and Anne criticises Bruno over his attempted suicide. This is only the beginning of all the horrors that will haunts them, because they are a pair of psycopahic Satanists who like group sex and black magic. I found this film very disturbing to watch, but enjoyed most of the film.