During the hot summer of 1888, three men are travelling by train to Cheyenne. Luke Tisdale, a medical doctor, seeks to claim the body of his murdered brother and find his killer. Marcus Stokesbury, a newspaper reporter from Atlanta, is in pursuit of a story about the mysterious third man, Ezra McPherson. Haunted by a violent past, Ezra becomes caught up in the conflict between the Wyoming cattle barons and homesteaders. He faces a stark choice: either run from the imminent range war, or enter the field of battle...