Harry Dresden still owes Queen Mab of the Winter Court two favours, and now she’s come to collect one. “Gentleman” Johnny Marcone, head of the Chicago underworld and newly a baron in the terms of the Unseelie Accords, has been kidnapped by forces unknown. Mab demands that Harry act as Winter’s Envoy in the matter and find him.
To complicate matters, the Summer Queen is sending warriors to challenge Harry. The Gruffs (yup, like the Billy Goats of the stories) keep showing up, each bigger and more powerful than the last to fight and possibly kill the wizard. Then he discovers who actually nabbed Marcone, and things go from bad to worse. The Order of the Blackened Denarius want to make Marcone an offer he can’t refuse, and make him accept one of their cursed coins. Harry needs to find them and stop them before it’s too late.