Britton of the Seventh

In 1876, Lt. Tony Britton of the 7th Cavalry is in love with pretty young Barbara Manning, but the wife of his superior, Capt. Granson, is in love with him and begs him to run away with her. Britton refuses, but is soon sent to arrest Sioux chief Rain-in-the-Face, who has murdered two soldiers from the 7th.