Centuries ago, Infernus brought the daemon to war against Longinus and his angelus, claiming the daemon were treated unfairly. The war ripped apart realms, but in the end, Longinus killed Infernus, and cast down the daemon and their allies. Now, the daemon and other low races live in the Lower District, while the angelus and the other divine races live in the Upper District. Scraps from the gold and silver city are fought over in the dirty streets of the Lower. Dia Sinistro is a 16-year-old girl who just wants to see if a better life is possible. Being the first of the low races to go to an Upper District school, Dia wants prove the daemon lot is not permanent, but it just requires someone brave enough to fight against it. However, rumors of Infernus returning swirl through the streets, and open revolt threatens to tear another realm apart, while she tries to heal it.