A former knight, lives in poverty and finds work as The Tracker. When hired to spy on an adulterous wife, he has no idea that soon he would be involved in murder and conspiracies and tracking a holy relic. 
 I really liked Crispin Guest, the sleuth. For one, a medieval mystery without a priest or nun as the sleuth was a nice change. And the tone was more "noir" as the subtitle implies.A very refreshing book and I definitely will read more in the series