This is the story of a fine young clergyman whose experience with his narrow congregation makes him feel a failure as a minister. He becomes a wanderer in the great, lonely, western uplands - but a wanderer with a purpose, until at last, love and faith awake and he finds "the pot of gold at the end of the rainbow." The story throws revealing searchlights on some of the interesting phases of mormonism and also answers a question often asked by listeners of RIDERS OF THE PURPLE SAGE, "what happened to Lassiter and Jane Withersteen after they trapped themselves in the lost valley by rolling a stone and causing a rock slide that closed the entrance?"