From The Art and Popular Culture Encyclopedia
The film features two parallel stories. The first one is set in an unknown past time and is about a young man (Clémenti) who wanders in a volcanic landscape (shot around Etna) and turns into a cannibal. The man joins forces with a thug and ravages the countryside. At the end, his company gets arrested and during his execution, he recites the famous tagline of the film: "I killed my father, I ate human flesh and I quiver with joy." The story is about the human capacity of destruction and a rebellion against the social prerequisites implied against it.
The second story is about Herr Klotz (Lionelli), a German industrialist and his young son Julian (Léaud) who live in 1960s Germany. Julian, instead of passing time with his radically politicised fiancée (Wiazemsky), prefers to build relationships with pigs. Herr Klotz, on the other hand, with his loyal aide (Ferreri) tries to solve his rivalry with fellow industrialist Herdhitze (Tognazzi). The two industrialists join forces while Julian gets eaten by pigs in the sty. Klotz and Herdhitze conceal the event to avoid a scandal. The story attempts to provide a link between the Third Reich and Wirtschaftswunder Germany.