A young filmmaker sets out on a 10,000-mile exploration of the national parks with his childhood friend during the centennial year of the formation of the National Park Service. Along the way, the two record stories of the people that work in the parks and those that come to enjoy them, as part of the rich tapestry of the history of the park system emerges. This stunning road trip is a tribute to the national parks and their history, and is also a recognition of the people that appreciate them and work to maintain their beauty.