Walt Longmire has been serving as sheriff in one of the counties in Wyoming for twenty-five years. His dreams of a peaceful retired life are shattered when a body is found near an Indian reservation. The murdered man's name is Cody Pritchard, and two years ago he and his friends received suspended sentences for raping a Cheyenne schoolgirl. And now someone has started hunting for them. They say that revenge is a dish best served cold, but little can calm the rage of a man on the warpath. And in trying to stop him, the sheriff, together with his assistants, may become a victim himself.