The Scarlet Rose and the Fox face a mystery of a terrible savagery. And because of this, the person in charge is nothing but a wolfman. A curfew is established, but it takes more to assign our heroes to residence. However the help of Belladone and his father, Hugo de Brisclavet, hunters of werewolves, will be precious to put an end to this scourge that terrorizes the inhabitants of the region.