Zane Grey

Marvin Harley (Tim Holt) returns to his Arizona ranch and finds about to be sold for taxes.

When the Tonto Rim gang attack Brad's stagecoach, they take the strongbox and kill one of the workers. Learning the gang member Patton is in jail, Brad gets himself thrown in also. Chito helps break him out and takes Patton with him.

Randolph Scott plays outlaw Vance Shaw who decides to change his ways and work for the growing Western Union company. His brother continues to pursue the life of an outlaw, even going so far as to try and sabotage the telegraph company as they lay down lines between Omaha and Salt Lake City. With the help of a Western Union executive Richard Blake (Robert Young), Scott attempts to keep the growing and important company out of the clutches of an immoral businessman (Dean Jagger). Western Union was adapted from a story by the noted western writer Zane Grey.

Three brothers become outlaws to prevent a greedy land developer from getting their ranch.