Here is the bold adventure story of William Dunn, an educated man yet an accomplished mountain man. His life becomes forever entwined with the wild, unforgettable, Grand Canyon. He hires on as a guide for the John Wesley Powell historic expedition into the Grand Canyon, but then leaves the expedition to guide two men back to civilization. During the trip they are attacked by Paiutes, Dunn escapes but is pursued and makes a wild run down the side of the canyon to the river. The river delivers him into the world of the Havasupai Indians where he finds love and inspiration for his future.