"In the midst of the largest motorcycle rally in the world, a young biker is run off the road and ends up in critical condition. When Sheriff Walt Longmire and his good friend Henry Standing Bear are called to Hulett, Wyoming -- the nearest town to America's first national monument, Devils Tower -- to investigate, things start getting complicated. As competing biker gangs, the Bureau of Alcohol, Tobacco, and Firearms, a military-grade vehicle donated...