Watch Bombuj. 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. "