A quiet village on the edge of a poor remote province is shaken by a string of brutal murders. Innocent children who got lost in the forest become victims of a furious beast. Broken trees, paw and claw tracks, bodies torn beyond recognition—all point to a mad bear-cannibal. But is that really the case? A team of detectives from St. Petersburg’s special department for dealing with maniac offenders, led by Roman Muromtsev, takes on the investigation. The team finds clues pointing to the guilt of a cold-blooded killer rather than a rampaging animal. The provincial authorities do nothing and stubbornly turn a blind eye to the evidence. Local residents blame the atrocities on some berolak—a half-man, half-bear. The fearless detectives launch a methodical hunt for the “werewolf” in order to prevent new victims. In the process, they uncover an ugly truth: the most dangerous and merciless predator is a human being.