Children of Harmony is set a few years after the events of "Last Problem" and is an alternate universe from MLP FIM. In this universe, Nebula Spark, the daughter of Twilight Sparkle and Tempest Shadow, plays the main role. Nebula is sent to Ponyville by her parents to focus on becoming a princess and make friends. However, Nebula would rather become a guard than a princess, which often leads to arguments with her mother. Nebula must choose between her dream and her duty. On her way, she has to overcome some difficulties. Will she stay true to herself?
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.