A singing cowboy clears a boy accused of murder by finding the real killer.

Working undercover, Allen and sidekick Mendoza are out to stop the mail train robberies. Rivers and his gang are the culprits and by joining up with them, they hope to get the evidence they need.

When Mickey accidentally knocks out a local boxing champ, he is forced to take the fighter's place in a bout.

Right after the Civil War, an ex-Union soldier sets out to become a schoolmaster in his small town, even though many locals still harbor a resentment against "Yankees". He goes up against the town bully, who both want the same girl, and his troubles multiply when a vicious band of nightriders set out to drive him out of town.

Shipwreck survivors land on an uncharted island inhabited by prehistoric beasts.