The film takes place in a small mountain town. Every full moon, there are brutal murders here. Locals are sure that a werewolf is behind everything that happens, destroying everyone who gets in his way. But the local sheriff, being a pragmatic person, does not believe in the existence of supernatural phenomena. He is sure that the killer is the most ordinary person. Marshall does his best to find the culprit, while trying to find a common language with his teenage daughter. In addition, he has to look after a seriously ill father. One day he manages to find some clues that point to something strange and inexplicable. Is there really an unprecedented creature behind all the murders? ..