In the Southern California desert, flashes of light have been spotted in the valley of the Durongo Indians. With nothing but rocks and minerals in the gorge, the mysterious phenomenon presents a challenging puzzle to geologist Mark Barnes and his young daughter, Angie.

While her father tries to understand the scientific reason for the flashing lights, Angie meets Zeke Goldenbough, an ancient Durongo Indian mystic. He enthralls her with strange tales, teaches her the language of his tribe, and shares his people's legends. But Zeke also tells Angie about the lights. According to Durongo...