Sheriff Longmire runs a small department in rural Wyoming. When the body of a man is found in the woods the investigation leads to tension between Longmire and the local Indian Reservation, as well as between Longmire and his Indian friend who runs a local bar.
Called to a home invasion, Walt and Vic find the critically injured Chris Sublette, a rodeo sponsor who has just dropped a rider accused of mistreating his horses. As the case unfolds, multiple motives come to light. Could it be revenge, theft, jealousy, or something more sinister?
A highly agitated young girl approaches a gas station owner for help. When Sheriff Longmire attends the scene, the owner is dead and the girl is missing. Investigations lead Longmire to existence of a religious cult in the neighboring Cumberland county.
The president of the Reservation Tribal Council is run off the road, shot and killed. Inquiries reveal that the president recently pushed though a council amendment to the blood percentage rule, thereby excluding a significant number of tribe members from their entitlements.
When Walt is called to the scene of a murder of a local youth, he instantly recognizes him as one of a group of four boys who were acquitted of the rape of an developmentally challenged Cheyenne girl. With the cause of death being an arrow to the chest, Walt must act very carefully as tribal tensions are still high surrounding the failed rape case. Meanwhile, the relationship between Walt and Branch continues to break down, and a Denver detective arrives in town to interview Walt about another murder case.