This fictionalized retelling of the journey of Meriwether Lewis, William Clark, and the Corps of Discovery tells the story of an unheralded member of the Corps -- Seaman, a 150-pound Newfoundland dog. Seaman travels the long journey with the Corps, serving a key role in the expedition's success, catching and retrieving game, and protecting the expedition team from wild animals. Come along with Lewis, Clark, the Corps of Discovery, and Seaman as they meet Sacagawea who joins the expedition; form friendships with several Indian tribes; survive near-death encounters, grizzly bear attacks, and buffalo bull stampedes through the camp; cross the Continental Divide; and overcome the wounding of their seemingly fearless leader, Meriwether Lewis.