The film takes us from the mouth to the source of the second largest river basin in the world, that of the Congo River (the largest is the Amazon). All along its 4371 km, we discover places that have seen the turbulent history of this country, while archives remind us of the mythological figures that created its destiny: explorers such as Livingstone and Stanley, the colonial kings Leopold II and Baudouin and leaders such as Lumumba, Mobutu and Kabila.