The Lone Ranger and Tonto save the arriving visitor, although the Indian's medallion is stolen. One of the recipients would arrive soon for the ceremony, and another was his long-lost grandson. Paviva, who loves the doctor, cries, "You were born a red man, and you will die that way." When an old Indian is killed, the Lone Ranger and Tonto visit Chief Tomache, who sadly reveals that he had found the silver medallions years before in the canyon, and that the men to whom he had given the pieces were now being killed. Declaring that he is after the reward money she has offered for the capture of the criminals, "Bret" flirts with Fran until Brady roughly reminds her, "You're my woman!" At the mission, Paviva begs James to admit he is an Indian, but he argues that concealing his ancestry is the only way he can make enough money to build a hospital for the Indians. Convinced that Fran knows something about the murders, the Lone Ranger pays her a visit disguised as Southern bounty hunter Bret Reagan. She and her deceased husband had discovered through years of research that the plaque revealed the location of Cibola, one of the fabled seven cities of gold that so intrigued the Spanish explorer Francisco Coronado. She pieces it together with a previously stolen medallion, but complains that she cannot yet make out the message inscribed on the original silver plaque, broken into five sections centuries ago. The Lone Ranger remarks that the ball of fire was undoubtedly a meteorite, but Redbird declares that it was dropped "by someone above." At the well-appointed ranch of respected widow Frances Henderson, Ross Brady, one of the hooded raiders, gives her the medallion he took from the murdered Indian's neck.
Later, near a body of water known as the Lake of Fire, Tonto and the Lone Ranger learn from a young man named Redbird the significance of the five-day torch-lighting ceremony just begun by the Indians: Many years earlier, a huge ball of fire had destroyed the camp of the Spanish soldiers who were planning to attack the Indian village. James Rolfe from the saloon in nearby Sandario, but the bartender, who also happens to be Sandorio's sheriff, has some roughnecks badly beat the "redskin" for daring to enter a white establishment. Concerned about the baby's health after his ordeal, Tonto tries to fetch Dr. A beautiful young Indian woman named Paviva is entranced by the child and decides to care for him. They take a baby that the Indian had hidden safely in the rocks to the mission of Padre Vicente Esteban, who remarks that the raiders have been killing and plundering for several months. While riding through some Arizona hills, the two unsuccessfully pursue six hooded outlaws who have just killed an Indian.
The Lone Ranger, formerly a Texas Ranger, fights outlaws with the aid of Tonto, his faithful Indian companion.