In order to bring the most powerful army into the nearing war, Casey and Brennon must travel to the kingdom of Eileen and seek the help of Aiden, a wanted deserter and spy. But the dark secrets of Aiden's past may threaten the mission and put them all in mortal danger. Meanwhile, Kate is building a powerful army of Sagen and preparing to do something that would change her forever. As Casey and Kate fortify their forces, dangerous and forgotten truths are uncovered, revealing secrets that may determine the course of the war.