A young and sympathetic teacher joins the music school. He leads the school orchestra and also teaches twelve-year-old Anezka to play the cello. The girl falls in love with him and only her grandmother, who lives alone and does not get along with Anezka's mother, her daughter-in-law, has any sympathy for her. But even she can't help Anezka overcome her first emotional turmoil, so the girl uses a little trickery to get closer to her teacher...