Franju's film contrasts peaceful scenes of Parisian suburbia with scenes from a slaughterhouse. The film documents the slaughtering and butchering of horses, cattle, and sheep. The film is narrated without emotive language.
La principale séquence du film montre un vampire attaquant un cobaye. On voit la chauve-souris s'approcher lentement, en marchant, du cobaye qui ne semble pas être effrayé. Le vampire lui lèche alors le nez, acte que le cobaye prend comme un geste amical et ne bouge donc pas, mais sa salive contient un puissant anesthésiant lui permettant d'endormir localement le cobaye, il peut alors le mordre à la joue, puis laper le sang coulant de la plaie ouverte.
An opening narration explaining that the film's purpose is to examine the "world strategy of food", in terms of its production, distribution and consumption. The film is then divided into three parts: "Food - As It Was", "Food - As It Is" and "Food - As It Might Be".