The film tells about the 12th World Festival of Youth and Students in Moscow. Meetings of the festival participants. Opening of the festival at the stadium in Luzhniki. Laying a wreath at the Tomb of the Unknown Soldier. Festival participants from different countries talk about their impressions (synchronously). Solidarity rallies during the festival. Boat trip and meeting with Muscovites. Theatrical performance at the Dynamo stadium. Visit to the state farm "Borets". Performances by amateur art groups. Closing ceremony of the festival.