Cato is a Heretic Mage, or at least the apprentice of one. For Cato and His Master, remaining hidden under the streets of Maraven, away from the watchful eye of the Protectorate and his Magisters, is the only way to avoid being hunted down and summarily executed. But hiding becomes a lot more difficult when a high profile member of the one of the ruling families is murdered, and all signs point to Heretic Magic...