A l'automne 1942, une unité d'agents russes menée par le commandant Sedovest déployée en Ukraine. Des rumeurs portent à croire qu'Hitler a érigé son nouveau QG dans le bunker Werewolf, au nord du pays. L'Armée Rouge exige alors que l'équipe de Sedovse rende sur place pour anéantir l'ennemi. En sous-effectif et en manque de munitions, ils deviennent de véritables appâts pour faire sortir Hitler de son bunker et détruire le camp nazi.

Childless spouses writer Andrei and artist Olga adopt the eight-year-old Ksyusha. The director of the orphanage where the girl was brought up is Andrei Iren's ex-girlfriend. She still passionately loves Andrei and intends to return him at all costs, even if for this he will have to destroy his family happiness. Meanwhile, Andrei is writing a science fiction novel about the dark side of Petersburg. On the pages of his book, the city on the Neva turns into a phantasmagoric world, where time itself has stopped, and the streets are inhabited by soulless creatures. Suddenly, Ksenia enters the world of "dark Petersburg" from the novel by Andrey, where he meets a mysterious friend Paramon. Heroes are waiting for many dangerous adventures...