When the site of his daughter's upcoming wedding burns down, Wyoming Sheriff Walt Longmire and his friend, Henry Standing Bear, witness the falling death of a young Crow woman and are recruited into an investigation that incites the wrath of the bride-to-be.

In 1867, the Kiowa travel to Medicine Lodge, Kansas, along with the Comanche, Arapaho, Apache, and Cheyenne to meet with representatives of the U.S. government and to sign peace treaties. But not all of the Kiowa agree that the peace treaty is a good thing, and tensions between them and the U.S. Army ("The Blue Jackets") are running high. So, when the army bugler disappears and White Bear, chief of the Rattle Band, finds his bugle out on the plains,...