U.S. Deputy Marshal Merlin Fanshaw arrives at the Crow Indian Reservation with orders to restore law and order. But a powerful rancher and his son block the deputy's efforts in order to retain their rigid control over the nearby settlement of Medicine Lodge. When a shocking murder rocks the town, tension and violence escalates between the Crow Indians and the settlers. Fanshaw must bring in the killer before an innocent man loses his life--or he forfeits his own.