This contemporary Western crime thriller returns with more mystery, drama and dark secrets from Absaroka County, Wyoming. Now that the mysterious White Warrior who tormented Branch is dead, Sheriff Walt Longmire (Robert Taylor) and his friends are ready to move on. Walt's best friend, Henry Standing Bear (Lou Diamond Phillips), is a free man; deputy Victoria "Vic" Moretti (Katee Sackhoff) is newly divorced; and Walt's wife's murder is seemingly resolved. But just when second chances seem possible for everyone in Big Sky Country, the Reservation's new casino doubles down on trouble. All 10 compelling Season Four episodes explore the promise of new opportunities for some, new relationships for others and new danger for those unwilling to forget the past until vengeance is served.