Harry Hargrave, an English photographer at large in Paris, seduces every pretty girl he can, in any way that he can. But when he encounters a family that appears to have a guilty secret, he discovers that they are all copulating without regard for their kinship. Harry steadfastly works his way through the entire family in ménage-a-trois, quatre, or even cinq. This is a catalogue of sexual perversions with bisexuality, incest, defloration, buggery (of both sexes), lesbianism, teenage sex… Well, the list is long!