Private detective Justis 'Jay' Fearsson is a weremyste. He wields potent magic but every month, on the full moon, he loses his mind. A legion of dark sorcerers has descended on Phoenix, wreaking havoc. Jay has to figure out what connects a billionaire financier and a vicious drug kingpin to an attempted terrorist attack, a spate of ritual killings, and the murder of a powerful runemyste. And he has to do it fast since the dark sorcerers have Jay in their crosshairs, and with his death they intend to extend their power over the entire magicking world.