When the body of a young girl is found at a rest stop with a bunch of money, the investigation leads to a group of young Mennonites on rumspringa.

A double homicide helps uncover a shocking partnership between the Cheyenne reservation and a Mexican drug cartel.

Cheyenne boys are disappearing, and the case may be connected to dishonest child welfare workers, a Cheyenne warrior legend, and an an ambitious Cheyenne political leader.

A paroled killer is mauled by a bear, but Longmire suspects that there is more to the story. Meanwhile, Branch's uncle creates havoc for the sheriff's department.

Walt investigates the murder of a beer distributor, where the main suspect is a bronc rider, but a stolen painting and secret affair lead to many motives for the brutal crime.