Lietenant Garrett Byrne has just recently been promoted to take command of a squad of black soldiers. Irish-born and no-nonsense, he clashes frequently with his second-in-command, and struggles with his feelings over being placed in charge of such a squad. His troop is assigned the duty of guiding and protecting a band of reservation Comanches who want to hunt buffalo. Along the way, they encounter hide hunters, a white homestead family with a mother and two small children, and a band of Indian-hunting Texas Rangers. It's a volatile mix was the journey becomes a grim tale of chase and survival amid racial hatred and violence.