In 1866, new fighting units are formed within the U.S. Cavalry: the courageous 9th and 10th regiments. History, judging from the regiments' list of Medal of Honor winners, calls them heroes. Against this backdrop, Sergeant Rutledge (Woody Strode), is a 9th Cavalry officer on trial for rape and murder. Lt. Cantrell (Jeffrey Hunter) defends Rutledge as witnesses give testimony (relived in flashbacks) revealing the sergeant's gallantry - and the shocking truth behind the alleged crimes.