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.

Roy Rogers
as Roy Rogers

Trigger
as Trigger

Dale Evans
as Lee Madison

Andy Devine
as Cookie Bullfincher

John McGuire
as Rex Gridley

Olaf Hytten
as Lionel Bates

David Sharpe
as Henchman Ulrich

Fritz Leiber
as Padre

Hank Patterson
as Deaf bus passenger

Fred 'Snowflake' Toones
as The Cook
CinemaSerf
The usual, routine, singing cowboy stuff from Roy Rogers as he is sent to investigate some shenanigans at a ranch on the US/Mexican border. The film really belongs to Andy Devine as "Sheriff Cookie"; the enthusiastic, if not desperately competent local sheriff who alongside trashy-journalist "Lee Ma...