 Bart Calhoun (Marshall Reed)is the nephew of Wells Fargo agent Rand Malloy (Pierre Watkin) and is double-crossing his uncle by working with Duke Winslow (Holly Bane as Mike Ragan.) Duke and a henchman try to hold up the stage carrying a $30,000 payroll, but are foiled by Johnny (Johnny Mack Brown), the company guard following on horseback. Bart and Duke report the failure to an angry Jeff Grant (Myron Healey) who is working on buying $30,000 worth of smuggled silver bars from Mexico to resell at a higher price in the States. Malloy is held up that night and killed, and Bart s watch fob found in his hand convinces Johnny that he was involved. With the aid of Malloy s daughter Tess (Wendy Waldron) and Malloy ranch-foreman Wade Shelton (House Peters, Jr.), Johnny runs down the culprits.