La minaccia nel deserto

The bandit Link Johnson and his cronies are besieged by Tex and Carson at the Masons' trading post. Doug, one of the scoundrels, drinks water from the well and is infected with a sort of mysterious disease. He goes mad and ends up killed by Link himself! The rangers burst in, but Johnson, now infected himself, manages to escape. Even the Masons' dog, infected by Doug's corpse, becomes dangerous and is put down! Meanwhile, while the rangers and the sheriff of Silver Bell chase him, Johnson infects a village of Papagos and the Indians, transformed into zombies with luminescent eyes, attack a stagecoach!