Mateo Acosta was one of the downworlders to plague the streets of New York, not that the Clave seemed to care much as they seemed to think there's not much trouble a seventeen year old warlock could cause. Mateo, however, tend to reek havoc everywhere he went. Clary Fray, lost shadowhunter, ties Mat to the shadowhunters of New York, tipping Mateo's world on an axis. This may be his last chance to learn control.