Der Werwolf von W.

It started in May. In a small town. And every month after that whenever the moon was full...It came back.

A gloomy small town at peace with itself on the edge of a bizarre industrial landscape. The former night watchman of the industrial complex is discovered murdered. The police inspector in charge of the case soon sees a link between the murder and an ominous poison gas depot established at the end of World War II by a Nazi partisan group called The Werewolfs.