Sérénité.

Poland, 1930s. Agata, a twenty-year-old young woman, a niece of the lady of a small manor, is about to get married. This fact causes dramatic changes for three people: Miss Stawro, a music teacher who cares for Agata, and two sixteen-year-old boys, Witek and Stas, who have their own feelings for the girl. However, the closer the wedding date gets, the more the bride-to-be is haunted by morbidly surreal visions related to her troubled past.