Tex Willer and his son Kit hear a gunshot in the desert, and it's not long before they find a dead man, the Pecos Sheriff, brutally shot in the back. Tex decides to secretly investigate how things are going in Pecos City, and the city's scheming rancher Sam Trusvott quickly arouses the former Ranger's suspicions. Fortunately, there are also decent citizens in the city who would gladly accept Tex as their new sheriff, but the villain has his own plans.