In Thunder God, the Lone Ranger and Tonto are drawn into a perilous adventure when an Indian is brutally killed for a map leading to a legendary buried city filled with gold. The outlaws, eager to claim the treasure for themselves, only manage to secure half of the map, leaving the other half in the hands of the dying Indian. As the masked hero and his faithful companion ride to the scene, they learn that the map is crucial for locating the hidden riches, and without both halves, the quest becomes nearly impossible.