The book offers the reader another meeting with the familiar commissioner Adamberg. This time, the commissioner must unravel a case that reeks strongly of devilry. The residents of the Alpine village of Saint-Victor can’t sleep: every night on the pastures they find mauled sheep carcasses. Soon people begin to die too. Ragged wounds on the neck, puddles of blood—no traces… It’s a werewolf, decided those who believe in terrible fairy tales. Or perhaps it’s a human being who, due to circumstances, has turned into a monster?