In the 1870s, a young Harvard dropout named John Sawyer finds himself adrift and alone in the Kansas frontier. Desperate for stability, Sawyer joins a team of rugged buffalo hunters, including the infamous Miller, a shadowy, elusive man and supposed legend of the plains. As the hunters embark on a treacherous journey to hunt and provide essential sustenance to the burgeoning American West, Sawyer is engulfed by the brutal realities of frontier life: the unforgiving terrain, the threat of Native American attacks, and the enigmatic, sinister presence of his mentor, Miller, whose startling secrets and erratic behaviors threaten to unravel Sawyer's fragile grasp on the meaning of truth and sanity.