When Michal, Petra, Flyby, and Zyon were babies, an old woman visited their parents and prophesied the four of them would embark on a journey. She predicted they would find answers for their city to rid it of the occupying enemy, the Tresdids, and they'd solve the problems of poverty and hunger. Michal, a human girl; Petra, the unicorn colt; Flyby, the golden eaglet; and Zyon, the little purple dragon, return home from their quest to the City of Mystery. They've discovered the answer they sought in Salvatore with the dreaded Tresdids. As they attempt to follow through with that answer, many adventures await, such as a flight above a giant mountain, a dangerous fire, and more. A sequel to The City of Mystery, The Battle Cry for Freedom follows the four adventurers as they each use their special gifts and talents to do good in the world.