During the American Civil War, the Union cavalry at Fort Bravo have to put up with two threats: the Confederate prisoners incarcerated at the Fort and rampaging Mescalero Indians. Captain Roper takes a no nonsense approach to dealing with both groups, to the dismay of his subordinate, Lt. Beecher. He develops a new interest however when the lovely Carla Forester arrives at the post. Unbeknown to anyone, she is there to arrange the escape of Capt. John Marsh, the senior Confederate officer. When she succeeds, it is left to Roper to track them down.—garykmcd