In Pecos Valley, New Mexico, a cattle war has erupted, pitting rancher against rancher across a once-peaceful land. It has thrust McCallister into the dead-center of one of the most violent battles on record—and barrel to barrel with the greatest challenge he has ever faced. His name is William Bonney. His victims called him Billy the kid. McCallister calls him a bad risk. But in the deadly gamble of the Lincoln County War, placing your bet on an outlaw like the Kid is the only game in town.