1892. Vappu Biörcke and Kaarlo Härkönen get to know each other during the summer in the countryside at the birthday of Vappu Jalle-sedä. In Helsinki, the young people continue their courtship under the supervision of Vapu's aunt, Moster Mella. However, Vapu's father, business advisor Ossian Biörcke, is not as accepting when his daughter's actions begin to be revealed.