An international collection of second-string actors grace the cast of this bargain-basement Sergio Leone knock off. Terence Stamp stars as Azul, the son of evil Mexican bandit Ortega (Ricardo Montalban). Although Azul is a mean, low-down, varmint like Ortega's three other sons, there is a slight glimmer of goodness in his soul since he is adopted. He proves it when he kills one of his brothers who was attempting to rape beautiful Texan maid Joanne (Joanna Pettet). Renouncing his adopted family and claiming a new moniker by the name of Blue, he helps Joanne and her father on their farm, and soon Blue and Joanne are in love. Remorseful at the loss of Blue, Ortega tracks him down to regain his love. Instead, Blue rejects him, and Ortega, humiliated and disgraced by his son's rejection, gathers together an army in order to return to wreak revenge upon the Texans. Now Blue must organize the Texans into a fighting force to face the bandit army of his father.