In the New Spain era, a tyrant ruling the San Fernando Valley attempts to wrestle a blacksmith’s daughter from the arms of her Irish sailor fiancé.

Stan Borden with the help of the stooge Sheriff is out to get the Toreno ranch. Kicking the peons off the ranch, they kill Miguel's father. Miguel then becomes the masked El Lobo and when Jim Lawrence arrives, the two team up to fight Borden and the Sheriff.