After his adventures in The Tower of Fools and Warriors of God, Reynevan is on the run again, harried by enemies—some human, and some mystical—at every turn. These are cruel and dangerous times for a man such as Reynevan, and to survive, he must set aside his history as a peaceful healer and idealist and play the brutal role of Hussite spy as crusades sweep through Silesia and the Czech Republic, and the world around him is forever changed.