The Limpet Hall Orphanage for Girls in the impoverished slums of Hyperion is no place for two young girls to grow up. But Giselle and Genevieve have always taken care of each other, waiting for the day they will be released from the servitude of the orphanage – and secretly daring to study Noble Arts, magical skills only available to the aristocracy. When they’re caught after hours in the library of the tyrannous Mistress of Limpet Hall, they have no choice but to take to the streets and forge their own paths. With new and incredible powers gleaned from the magical technology once forbidden to them, one girl will take up the massive burden of saving the world and the other will direct all her efforts to tearing it apart!