The unthinkable has happened. France has fallen. Flags of Nazi occupation fly throughout the land. Defiantly, the resistance group called the Marquis fights back with sabotage and reconnaissance. Yet somewhere in that courageous organization, a turncoat lurks. Operation Secret, from the director of Breakthrough and Guadalcanal Diary, opens with the convening of a tribunal intent on identifying the traitor. Key testimony unveils via flashback a remarkable tale of war and subterfuge boasting actual footage from aerial Allied missions. Cornel Wilde portrays the U.S. Marine whose daring covert activities and narrow escapes are the focus of the investigation. For heroic excitement, Operation Secret is mission accomplished.