After Henry overhears a disgruntled husband try to order a hit on his wife, Walt and the team must use what little information they have to prevent her murder. Vic is wary when an ex-cop from Philly shows up in Durant.

Longmire investigates after he receives a safe deposit box from a just-murdered inmate that contains a severed finger that is linked to both a new murder and a 20-year-old armed robbery. At the same time, Vic's paranoia peaks when she suspects she is being stalked, forcing her to confide in Walt.

Walt and Branch team up when an apparent suicide is connected to Cady's accident. Meanwhile, Detective Fales returns with warrants, forcing Walt and Henry to face what happened in Denver.

Walt and the team track missing teenage campers on a leadership trip in the wilderness. Branch continues his unauthorized search for his shooter.

Vic's vacation turns deadly after she and Sean are kidnapped following an accident. Walt is forced to make an unusual alliance to rescue the pair.