Sent to investigate the mysterious disappearances of several officers and explorers, Lt. de Saint-Avit and Capt. Morhange travel to the vast expanse of the Sahara and discover a forgotten world. Lured to a hidden palace by Queen Antinea, descendant of the king of Atlantis, Saint-Avit and Morhange become pawns in a deadly quest for immortality. Directed by the renowned Jacques Feyder, this fantasy tale stars Georges Melchior and Jean Angelo.