Pharmacist Pavlovský has a modern and sporty son, Karel, also a pharmacist, whom he would like to marry. He therefore sends him to Kutná Hora to live with his friend Řep, who has a daughter of marriageable age. However, Miroslava is a girl strictly led by her conservative parents and therefore lacks any charm. Karel also meets his uncle Ambrož in the family, who lives a double life. He is a serious older man by day and secretly flees at night so that he can perform in the local theater.