Princess Helena is forced on her wedding day to co-serve one husband alongside Damon, Lia, and a child posing as the heir, and to share the throne. She refuses to yield, resolutely removes her wedding ring, and activates the Black Shield Guard left by the late king. With Cassius by her side, Helena exposes treason, embezzlement of military rations, a fake heir, and the murder of the late king—and rebuilds Sparta in her own way.