AllMovie

In this baroque Spanish horror film, there is no end of nefarious goings-on. A modern Spanish family lives in a capacious castle. One son of the family wants to inherit the castle, so he chains the rightful heir, his half-brother, in the basement. No one is searching for the brother, who is believed to have died in a (faked) car crash. Nor is there anyone to protect the poor, mad mother. Perhaps they are being held in readiness for the family's annual satanic human sacrifice, also conducted in the basement. The supposedly dead brother's fiancee visits the castle for her vacation. Somehow the chained brother is freed and further mayhem follows.