Lieutenant John Patchen has come to Montana to persuade Chappie Plaquemines, his former gunnery sergeant in Iraq and the son of Gabriel Du Pré's girlfriend, to accept the Navy Cross. First, however, Du Pré and Patchen must find the wounded marine, who was last seen drinking heavily in the Toussaint Saloon. They locate him soon enough, disheveled and stinking of stale booze, but a sobering visit to a medicine man's sweat lodge reveals a much greater mystery: the unsolved case of a band of Métis who were last seen fleeing from General Black Jack Pershing's troops in 1910 before disappearing.