The five sisters of House Vance lead The Vance Legion, achieving distinguished service in battle. During a campaign, Cordelia is ambushed and left mentally impaired. After the Thorne scion Corbin breaks off their engagement, she secretly regains her senses and feigns madness to unmask her attackers. She soon discovers the shocking truth: Dravon conspired with her sister Beatrix and Corbin to assassinate her. Their goal? To seize The Dragon Jade of House Vance, command the Legion, and conquer the realm. Biding time in the ashes, Cordelia unravels their deadly plot, eliminates the traitors, and rises again to lead her army and defend the nation.