St. Louis, 1809. Three years after the triumphal return of the Lewis & Clark Expedition, Meriwether Lewis never felt less like a hero. Trapped in a thankless political job, he's drinking too much and spending money like there's no tomorrow. When he's called to a mysterious meeting, Lewis hopes for a new adventure that will turn his life around. Instead, he finds himself drawn into a conspiracy to put him and William Clark at the head of a new American empire. Lewis has his faults, but he's no traitor ... and suddenly Lewis the explorer becomes the hunted. As for Clark, he's willing to risk everything to save his best friend from dishonor and disgrace. In the end, neither man can imagine the price to pay for their loyalty to each other and to their country. History and fiction merge seamlessly in this thrilling historical novel based on one of America's greatest unsolved mysteries. Lewis and Clark's last journey is a classic story of honor, vengeance, and redemption.