Cattle rancher John Drake sends his son, Ted, to the Mexican border to stop the smuggling that is using Drake`s land as the crossing point. Ted meets Ysabel Castro, the daughter of the rancher just across the border-river, when he saves her from a mad-bull. He captures a messenger for the smugglers, captures him and then goes to the gang`s camp posing as the messenger. They soon find out he is an impostor, and he and Ysabel and her father are lined up before a firing squad. Maybe Silver King can summon the Calvary.