South of the Border

United States government agents Gene Autry (Gene Autry) and Frog Millhouse (Smiley Burnette) are sent down to Mexico to foil the plans of foreign spies trying to start a revolution on the Mexican island of Palermo in order to gain control of American oil facilities and establish a submarine refueling base. When they arrive in Mexico they attend a fiesta, where Gene has his heart stolen by the beautiful Señorita Dolores Mendoza (Lupita Tovar).