Joe finds shelter in a freight train yard. Joe aids the railroad guard plagued by thefts from freight cars. THE GERMAN SHEPHERD JOE FINDS A FRIEND IN RAILROAD guard Charley (Bill Walker) as he helps foil the thieving activities of a pair of men known as "The Yardbirds". Joe becomes acquainted with a railroad guard plagued with thefts of merchandise from freight cars by two men, Horn(Buck Kartalian) and Bunny (Bobby Hall), who have a confederate in a Chicago railroad yard. Employing his Army sentry dog training, Joe assists Charley in the dangerous job of catching the thieves.