Although only a young woman Katherine is becoming a professional in her trade - hunting werewolves. The year is 1642. It's cold in Russia and Royal Russian Lycanthropes are a problem. Desperate people pay highly for her skills and ferocity. She is rarely out of work. With her father injured she took on the last assignment alone, obsessed with wiping them out armed only with her wits, her hound, Tsar, and a ton of weapons. She has not killed them all yet. But then.