How much can war steal from one man? Georgia, 1861. As the tides of war sweep south, Aidan MacAlister is drawn north like water up a reed by the inexorable pull to defend his land. After tragedy strikes at Gettysburg, Aidan spirals into unfamiliar, dark places of unbridled fury, earning him the nickname, the Fourth Horseman. A hero to his fellow soldiers, Aidan’s self-loathing consumes him, and every lesson his family taught him crumbles to dust beneath its weight. Aidan returns to the farm to find it ravaged by Yankee patrols. War has taken all—perhaps even his soul.