Private investigator Lena Jones is called to Walapai Flats after her Pima Indian partner Jimmy Sisiwan is arrested. When she arrives, she discovers Jimmy's sister-in-law, founder of Victims of Uranium Mining, has been murdered, due to her protests against the construction of a new uranium mine located only ten miles from the Grand Canyon. Ike Donohue, the mine's public relations representative, is also found dead, and Jimmy is suspected of killing him. It's up to Lena to discover the truth and clear Jimmy's name. In addition, she finds herself investigating the sad history of the town tied to the U.S. government's atomic testing program and the mysterious deaths surrounding the 1953 filming of "The Conqueror."