A minor and very forgettable giallo from Helia Colombo of which this is the only achievement(which can be understood ...).
The story is a little too talkative and if the rules of the genre are rather respected, the resolutionof the intrigue is quickly dispatched. As for the pseudo-scientific postulate, it gives the impression to have been added without coherence or link with history.
The only real "strong" point of this film: the four actresses who are naked there are ... uh ... frankly cute, starting with the beautiful Elena Veronese.
Who said it's already not bad ? Not me anyway ...;D