Documentary about the life and work of Brazilian movie director Glauber Rocha. Mounting documentary narrated in first person by the filmmaker Glauber Rocha, addressing his defense of the term audiovisual policy and a reflection from the dialogues of the characters of their films. With a free image editing program of Open TV, which commanded Glauber at the end of 70, Portrait of the Earth also causes a metalinguistic discussion on the role and direction of television.