The first part leads us to the rehearsals of a small town brass band. Its authoritarian bandleader commands the collection of amateur musicians. Among them is the young, shy trombonist Vlada, who is thinking of sneaking away from the upcoming festival because he wants to see a motorcycle race taking place at the same time.
The second part follows a group of young singers applying for the Semafort Theater. Hundreds of young girls have come, some of them talented, some not, some beautiful, some less. Some are very shy, others very ambitious. Among them is a girl named Vera, a semi-professional singer who should have no difficulties.