Three young Muscovites come to do odd jobs in a remote village in the Volga region: they have to remove from a wall a dying fresco in an abandoned church. The fresco depicts a heretical image of Saint Christopher with a dog’s head. It turns out the village used to be a schismatic hideout, and the job was an experiment by mysterious dengerologists—"sappers" of world culture. And in the haze of peat-bog fires, the lost historical memory gives birth to a terrifying Psoglavets—either a demon of schismatics or a god of camp guards. If you like, it’s a genre novel: a horror story about werewolves. If you prefer, it’s a new village prose. If you wish, it’s a stylization of web-surfing on the theme of the Russian schism. But overall, "Psoglavets" is a story about the invisible boundaries of culture and its wardens. Every society has a certain circle of beliefs, and society doesn’t allow a person to leave that circle. And if someone dares to cross the sacred boundary, then monsters rush after them.