Paul Ravenal, an officer in the French Foreign Legion, falls in love with Marguerite Lambert, who through unfortunate circumstances is a dancer in the notorious Iris Cafe in Morocco. He is ordered to quell an uprising among the Riffs but learns that the uprising is a ruse to enable the natives to precipitate a massacre in the city. His superiors will not listen to him, and he returns to town, disguised as a native, and saves his sweetheart and the Europeans. Cast out as a deserter, he organizes a regiment of natives when the World War breaks out and under an assumed name offers them to France. His heroism on Flanders' Fields restores his honors and citizenship. Wounded, he is rejoined by Marguerite, who is serving as a Red Cross nurse, and she becomes his wife.