Aerial photography highlights this early sound actioner, set during World War I. Lt. Robert Banks (Charles "Buddy" Rogers), an American flier on leave in Paris, meets fellow American Mary Gordon (Jean Arthur) and the two fall in love. In combat, Banks makes a captive of Von Baden (Paul Lukas), the notorious "Grey Eagle." He brings Von Baden to Army headquarters, but there he is drugged by Mary, and she and Von Baden disappear. Eventually Banks discovers that Mary is an American counterintelligence agent, on a mission from the government.
by Nicole Gagne synopsis