A boy is sitting at a table, writing a letter for Boris Prutkov. The cartoon follows the journey of this letter from Rostov to Leningrad, where its addressee Prutkov has just left for Berlin; when the letter arrives in Berlin, Prutkov has just departed for London; as the letter arrives in London, Prutkov is already on a steamboat to Brazil; and once the letters is delivered by the postman Don Basilio, Prutkov is already on his way back to Leningrad – where the letter, having followed Prutkov around the world, finally reaches him. The film sings a song of praise to the global postal services and to the reliability of the postmen, but it also tells the story of a journey around the world, returning once more to the new Soviet capital: Leningrad.