This somehow odd film from Italian Cult Gothic Horror director Freda ("L'Orribile Segreto del Dr. Hichcock") is almost unknown and extremely difficult to find nowadays.
Made a year after his rough Giallo "L'Iguana Dalla Lingua di Fuoco" (see also my comment on that), the title suggests yet another Giallo (it means "Taken From the Secret Police Files of a European Capital" and fits perfectly into typical over long and wonderful Giallo titles like "Il Tuo Vizio e una Stanza Chiusa e Solo Io ne ho la Chiave" of the same year). But, in fact, this film is not a Giallo at all - but a Gothic horror story about a cursed pearl necklace and a strange Satan's Cult which gets confronted by a hippie quartet on a day out. The story sounds unique, and the film is it, too.
Made on a very low budget, Freda made more than the best out of it and created a strange movie with all the classic Gothic elements, and also boosts a handful of astonishing gore effects that echo the rude sequences of his Giallo a year before.
The cast is lead by Camille Keaton of "I Spit on Your Grave" fame, while Luigi Pistilli ("Reazione a Catena") delivers another neat performance as the leader of the strange Cult. The soundtrack is composed by Stelvio Cipriani and is cool as usual. A film worth looking for despite its rarity.