Stalingrad est devenue un enfer et un paradis pour ceux qui méritaient une récompense, mais la seule qu'ils aient réussi à obtenir était l'amour. Comment ont-ils gagné, comment ont-ils vaincu, qui ils étaient et qui était de l'autre côté de la rue, quels secrets ont-ils emporté avec eux... Le film raconte cette histoire...

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...