A documentary about the first century of pornographic cinema, including extracts from pornograhic films and animated movies. In order to show the evolution of this genre, the film is divided in several parts: "Une préhistoire clandestine" ('a clandestine prehistory'), "Le temps de la libération" ('freedom time'), "L'age d'or du X" ('heyday of porno'), "L'explosion de la vidéo" ('the multiplication of videos') and "Les nouvelles tendances" ('the new tendancies').