A human princess forced into marriage with a demon prince to secure a fragile peace discovers herself trapped in enemy territory when her new husband abandons her to wage war against mysterious forces. Left vulnerable in a realm where demons and humans are ancient enemies, Aelin must navigate treacherous court politics and hidden dangers alone. As dark secrets unravel and her position becomes increasingly precarious, she begins to question whether the greatest threat lies with the demons surrounding her—or the truth behind her husband's sudden departure.