A Texan robs a train in an effort to prevent his father from committing the crime. A young girl attempts to help him after learning about the theft. A cowboy friend demands a share of the money.

Bitter over their divorce, a wealthy businessman prevents his ex-wife from seeing their child. She then takes him to custody court and a judge tries to determine what will be best for the child.

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.