A film chronicle about the celebration of the Day of Enlightenment in Leningrad on May 31, 1925. The city of Leningrad is decorated in honor of the holiday. Fireworks, luminous inscription: "THROUGH DEFEAT TO VICTORY". Theatrical performance from the life of the tsarist time. The festive demonstration is attended by schoolchildren, young athletes and adults. They are held at the Narva Triumphal Gates, at the building of the Moscow-Narva Regional Committee of the RCP (b) with the NDP: “PROLETARIANS OF ALL COUNTRIES UNITE! MOSCOW-NARVSKY DISTRICT COMMITTEE OF THE RUSSIAN COMMUNIST PARTY (BOLSHEVIKOV) OF THE LENINGRAD ORGANIZATION ". Athletes carry the emblem of the Komsomol sports society Spartak with the NDP: “SPARTAK. KIM. 5TH SPARTAK ANNIVERSARY ... RKSM ... ". In the hands of others, banners, layouts of books ("G. ZINOVIEV FIRST FIVE YEARS OF THE COMINTERN", "THOUGHTS OF LENIN", "SIMPLE CONVERSATIONS ON SELF-EDUCATION", "PROLETARY IN THE VILLAGE ...", etc.), books in the agit-car ("PINKERTON" , “ABOUT LENINISM”, “BIBLIA”) and banners with the NDP: “ABOUT? NO ENTERTAINMENT CHEAPER READING. " Children with letters on their chests form the words: "BOOK FUND" and "OUR READER". In their hands are flags and tablets with information about the number of books in different fields of science and culture, as well as how many readers are represented in each social and age group.