Along the Mexican border, Roy joins Western novelist Dale in a search for smugglers. They discover a silver mine.

Gridley is mining silver from an old Mexican mine and bringing it into the USA thru a passage into his worthless mine. Border guard Rogers suspects Gridley and finally finds the secret entrance to the Mexican mine. He sends Lee Madison for help only to have her captured by Gridley. Trigger brings help that takes care of Gridley's men and now Roy has to rescue Madison.—Maurice VanAuken <[email protected]>

Border Patrolman Roy Rogers is sent to the Mexican border in southwest Texas to investigate mysterious doings at the Rancho San Angelo. There, with the help of local sheriff, Cookie Bullfincher, and Lee Madison, a western pulp magazine writer looking for story material, Roy discovers that the Rancho is actually a front for smuggling silver across the Mexico border into the United States. After rescuing Lee from the gang led by "Red" Grindley, the crooks are bought to justice...and there is a surprise awaiting Sheriff Cookie.—Les Adams <[email protected]>