50 year old journalist Kovalev finally gets the chance to become the editor-in-chief of the newspaper. Not wanting to tempt fate, the hero turns to the party organizer for support. And then something unexpected happens, Kovalev's ankle is bitten by a dog, and he becomes a werewolf. Turning into a terrible dog at night, Kovalev has been prowling the city ever since and instilling fear in his readers. Policeman Vasily, the son of an unfortunate journalist, is entrusted to find and neutralize the beast.