A government agent, Steve, is on the hunt for a gang of thieves who stole the U.S. Mail. After Old Henry takes down an outlaw trying to rob a stagecoach, the gang returns to his home and kills him. Henry's son, Jack, who has just returned from the East, learns how to shoot from the Durango Kid. Meanwhile, Steve infiltrates the gang to catch the thieves.
Pecos River
A notorious outlaw assumes a new identity as the Durango Kid and assumes the role of a postal inspector to pursue the gang of highwaymen who brutally murdered a respected old driver, Old Henry.