Here's a short description of the novel from the Tattered Cover web site:
Embarking on his eighth adventure, Wyoming Sheriff Walt Longmire has a more important matter on his mind—his daughter is getting married. Walt and old friend Henry Standing Bear are the de facto wedding planners and fear the daughter's wrath when the venue goes up in smoke two weeks before the big event. The pair set out to find a new site for the nuptials on the Cheyenne Reservation, but their scouting expedition ends in horror as they witness a young Crow woman plummeting from the majestic cliffs of Painted Warrior. It’s not Walt’s turf, but the newly appointed tribal police chief and Iraqi war veteran Lolo Long ropes him into helping with the investigation. Walt is stretched thin as he mentors Lolo, attempts to catch the bad guys, and performs the role of father of the bride.