The Devils Nightmare is a creepy atmospheric film. The plot involves 7 tourist, who each represent one of the seven deadly sins, who must stay in a castle for the evening since the road they are taking is blocked. Later in the evening a succubus disguised as a woman comes to stay the night as well. The succubus attacks each person using their pleasure against them. Erika Blanc appears to really enjoy playing this roll. This is an enjoyable piece of early 70's Euro-horror.

It's a shame the DVD has no subtitles for the italian audio. I guess the film would be better without the campyness of the english dub.