director Jean Rollin
I gotta think that this film is for only hardcore Jean Rollin completists. While it lacks vampires, it does feature nubile lesbians, a crime plot, and is shot on location at an interesting old building presumably in the French countryside. There are definite Rollin-esque elements someone from the auteur school would appreciate.
There’s also a fair amount of nudity and simulated sex. As well as a torture trope.
All told, it might be one of Rollin’s worst films, but not entirely uninteresting if you dig in Rollin’s work.