This documentary explores the jungles of the area known as the Belgian Congo (later Zaire and then Democratic Republic of Congo), as filmmaker Henry Brandt shows many of the customs of the tribesmen that were previously unknown to Western audiences. However, this film delves into all the life in the region, spending considerable time with both the animals and the vast plant life of the Congo. Narrators Orson Welles and William Warfield provide information to accompany the impressive images.