This one is an enjoyable giallo from future gore legend Lucio Fulci. It is very light on the violence and surprisingly heavy on the sexy business. The version now available on DVD under the title Perversion Story is apparently the French edit which (surprise surprise) played up the sex angle.
It makes great use of its San Francisco locations (foreigners shoot America better than Americans IMHO) and is very much a time capsule of the late 60s (psychedelic tinged jazz pop soundtrack, Blow Up inspired photo shoots, swinging night clubs, etc.).
The plot is typical, convulted giallo Maguffin and seems to be Fulci's take on Vertigo's doppleganger angle (fitting considering the SF locale). The DVD presentation looks fantastic especially considering the films obscurity although there are a couple of instances where the original distributors imposed edits seem quite obvious and jarring. It hits all the sweet spots for the Euro Cult fan; it has beautiful lithe Euro starlets in various states of undress, a pop-art sensibility, the hypocritical indictment of the bourgeoisie while still reveling in their decadence, and a groovy score. It also features a clunky, talky denouement but what are you gonna do?
It is not a great film by any means but fans of Euro Cult, giallo and Fulci in particular should get a kick out of it.