In this post-apocalpytic adventure story, narrated by Van Johnson, Teo (Fabrice Josso) lives underground in a cave with his father, who is a member of a ruling clan. Except for people within a family, all contacts between citizens are supposed to be electronic. However, Teo manages to contact and arrange to meet a girl named Beatrice (Ines Sastre). Not only that, but they use forgotten conduits to travel to the forbidden aboveground world. There, he and Beatrice meet and have some adventures with rat-like mutants living in the ruins of old cities while a man from the caves (Horst Buchholz) hunt for them. At first these adventures with the mutants are purely hostile, but eventually Teo becomes a leader among them, and takes them to a place where they may be safe from attacks by the underground people. 1990