The Yuma Kid and his partner Cheyenne rob a bank and head across the hot desert towards Mexico. The Lone Ranger and Tonto learn that the sheriff and two deputies are trailing the outlaws and decide to give assistance. The Lone Ranger figures the outlaws will head for the only water source in the area, but the outlaws beat them to it and dynamite the water hole, making it nearly impossible for anybody to continue to pursue them. The Lone Ranger adopts the disguise of an old prospector and tells the outlaws he has found a large gold field. The outlaws allow him and Tonto to go with them to their hideout to get water where two other outlaws are waiting, intending to get the location of the gold strike and then kill the 2 miners. At the hideout, the Lone Ranger drops the prospector act and tries to capture the outlaws. The Yuma Kid gets the drop on our heroes, however. Quick-thinking Tonto acts like the water they have been drinking is poisoned, which gets the outlaws suspicious of each other and fighting amongst themselves. The outlaws are easilly overpowered.