In Colorado territory, Miles Archer is asked by the cavalry at Fort Bellows to aid in rescuing two white women abducted by the Cheyenne and to provide security for the railroad construction teams.
A wagon train heads for Denver with a cargo of whisky for the miners. Chaos ensues as the Temperance League, the US cavalry, the miners and the local Indians all try to take control of the valuable cargo.
A white man trades with the Comanche for the release of a female stranger and the pair cross paths with three outlaws who have their eyes on the handsome reward for bringing her home and Comanche on the warpath.
John Russell, disdained by his "respectable" fellow stagecoach passengers because he was raised by Indians, becomes their only hope for survival when they are set upon by outlaws.
Only the Valiant, a classic western adventure, based on a novel by Charles Marquis Warren, the film tells the story of a Cavalry officer who volunteers for a suicidal mission to fight the hostile Apaches in an effort to prove his loyalty to his men and the woman he loves.