Dakota Territory, 1866. Following the murders of a frontier fort's politically connected sutler and his wife in their illicit off-post brothel, Lieutenant Martin Molloy and his long-suffering orderly, Corporal Daniel Kohn, are ordered to track down the killers and return with "boots for the gallows" to appease powerful figures in Washington. The men journey west to the distant outpost in a beautiful valley, where the soldiers inside the fort prove...