Produced for television by Claude-Jean Philippe, the « Encyclopédie audiovisuelle du cinéma », recounts the history of French cinema from its birth to the beginning of the 1960s. With commentary read by Jean Rochefort.

Alberto Cavalcanti reviews his own prolific career as a filmmaker.

This film is based on actual letters German soldiers sent home from the siege of Leningrad during World War II. The litany of trouble these poor grunts endured is lamentable. One complains of returning home an invalid. An SS man has bad dreams about the Russian tank-driver he killed. Another complains when he sits down to hear a piano recital and one of the musicians has frozen fingers. Another soldier swears he will never forgive his father for injuries he suffered in the invasion of Leningrad. Stock footage of wars from World War II to Vietnam are inserted and give an ironic tinge to the feature.

The film, made to advertise domestic telephone sets, is based around two very different families. The Petts are conventional, happy and have children; the Potts are unconventional and unhappy, without children.

The first behind-the-scenes documentary in the film industry, from the making of a camera (Debrie) to studio shooting and directing, including animation techniques. Pierre Chenal meets André Rigal who executes, in his workshop, a series of freehand drawings. These sketches are then ground in a coffee grinder, from which a cartoon on film emerges. In Champigny, Alain Saint-Ogan and his host are working on Zig et Puce and developing Alfred the penguin's first steps. In Fontenay-sous-Bois, Ladislas Starewitch presents his future stars. Pierre Chenal described his film as follows: “I had designed to shoot a documentary in which I would show how a film is made in order, at the same time, to learn it myself. "