Rostov-on-Don. Construction of the Selmashstroy plant. Leningrad. Making skis at the factory. Karakozova. Children go to the 1st grade school, located on the territory of the Kotovsky Village Council, participate in the agitation campaign for the re-election of the Council. Radio transmission of one of the villages, peasants listen to the radio in the hut-reading room. Place of the fall of the Tunguska meteorite in the Turukhansk region. Preparing at Sovkino for staging a meteorite fall using a model. American traveler Byrd is sailing on a ship.