Reeling from a Civil War that divided both their country and their family, a brother and sister (Barlow Jacobs, the Master, and Clare Bowen, Nashville) reunite on the western frontier. The two siblings become reacquainted, torn between a desire to reconcile with the only family they have left and their clashing convictions. Tension and suspicion continue to mount as they begin to uncover each other's unforgivable secrets.