The Poplavskys' apartment in Minsk (Belarus). Konstantin Iosifovich, a former collective farmer, after graduating from the Minsk Conservatory - concertmaster of the State Choir. Stefania Petrovna is a wife. The children of the Poplavskys - Kristya (6 years old), Yadya (4 years old), Chesik (3 years old), have an absolute ear for music. Yadya and Chesik repeat sounds unmistakably. Kristya and Yadya play a 4-handed piece on the piano. Kristya performs PI Tchaikovsky's musical miniature "Skylark" in the Palace of Pioneers in Minsk. The pioneers are listening. Cheering.