A budding teacher comes from Prague to the South Bohemian district town where her fiancé Jakub, a young promising engineer at the local paper mill, lives. Petra is getting to know her new colleagues at school and the children in her new class, and is practicing hard with the Komenium music group, whose members she has known since her studies. She also gets to know Jakub's colleagues and the director of the paper mill, to whose position Jakub would like to be appointed after his retirement. It is this desire for a high position that leads Jakub to behave and act in a way that Petra cannot approve of.