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.
as Roy Rogers
as Trigger
as Lee Madison
as Cookie Bullfincher
as Rex Gridley
as Lionel Bates
as Henchman Ulrich
as Padre
as Deaf bus passenger
as The Cook
as Bus Driver
as Bob
as Pat
