What is wrong with this film? Something is very wrong from the beginning, which even Richard Johnson feels from the start, and yet he stays on when he shouldn't in a kind of subconscious urge to go to the bottom of the undefinable anomaly, which he does.
He is allured by an old lady to take on the task of catalogizing the books and manuscripts of an enormous old library in the grand old palace where the lady lives, but it appears that she has a daughter who is as attractive and sensual as the old lady is not. Of course he stays on by the attraction and mystery of this daughter, but after some time it appears that he has a rival, who also is engaged in a passionate relationship with her. There the problems begin getting constantly thicker to the very end.
There is nothing wrong with the actors or the story or the very interesting and skilful cinematography, but this is a case involving suopernatural elements, so there is some magic involved, but that is what is lacking. There is no magic at all here. Rosanna Schiaffino as the daughter is not convincing but rather callous no matter how beautiful she is, Sarah Ferrati as the grand old lady is repellent in her hard inhumanity, Gian Maria Volonte is perfect enough for his passionate part like Richard Johnson, but this is great cinematography entirely without magic, which is the most important thing, especially in a story like this. Instead of being fascinated and involved in the mystery, you are disgusted and learn to hate the old lady just like Richard Johnson does, so this is not a very recommendable film, unless you like directors like Bertolucci, which has the same callous and inhuman way of screening humans in erotic involvements focussing on sex and forgetting all about love.