Paris, May 1931. Black culture is in vogue at the same time that a great colonial exhibition displays the peoples of the world subjugated by the French Empire. It is then that a group of researchers travels to Africa and undertakes an ambitious ethnographic mission. On their way from Dakar to Djibouti, they collect a large number of objects destined for the Musée de l'Homme. Is it a well-intended adventure or a great plunder?