Anna is a beautiful,fiercely independent blind woman. Due to financial problems her husband Carl has to sell the apartment they lived in. They move in an old house in a remote location surrounded by fields. Anna is not happy there and feels even more isolated as she is most of the time all alone… but eery noises and strange facts lead her to think that someone is in the house too... or "something".
An erotic horror movie dedicated to Joe D Amato, Hyde's Secret Nightmare combines the two genres and mixes them in equal parts. Cross-cut erotic and horror scenes are kept together by a thread of dramatic force bordering on obsession, paranoia, phobia, perversion, and lack of self-acceptance. Everything unfolds in an extreme world where sex seems the only way to attain a state of well-being.
A team of researchers investigates a European castle that was used for sadistic tortures during the inquisition, as well as horrifying and abominable Nazi experiments on innocent people. Riddled with history, the demonically possessed castle overtakes the crew turning their nightmares into a terrifying reality.
Six people struggling with their relationship, or lack thereof, cross paths with their respective exes — and discover they might still harbor feelings for each other.