Lanford Carcell has belonged to the Order of the True Face since childhood, where he was trained to serve as a kamaril - a hunter of special magical creatures - the vetuvyars. The Vetuvyars are unpredictable and dangerous; they are werewolves with two faces of equal strength. Five hundred years ago, the head of the Order of the True Face vowed to exterminate all the Vetuvyar, but the fewer of them there are, the more difficult it is to reach them. Lanford is given an almost impossible task: to destroy the last two vetuvials - the king and princess of a neighboring state, whose death could turn into the largest war in history...