Ullabella is a dreamy teenager who is in love with her teacher. But one day, when she refuses to do as he says, he slaps her. Ullabella tells her family about it, and then the case begins. Ullabella's mother and uncle, who is a politician, take the case all the way to the political level and demand at least an apology from the teacher. He refuses to give one, but a solution to the case is found nonetheless.

Gitte Hænning
as Ullabella Jensen, elev i 3. mellem

Sigrid Horne-Rasmussen
as Ullabellas mor

Karl Stegger
as (Ullabellas far

Jens Østerholm
as Axel Lysgaard, Ullabellas lærer

Johannes Meyer
as Overpræsident

Elith Pio
as Stiftsprovst

Kirsten Walther
as Agnete Mørk, skolelærer

Gunnar Lemvigh
as Viggo Bræstrup, Ullabellas morbror

Poul Thomsen
as Vendinius, redaktør

Else-Marie Juul Hansen
as Johanne Kirchhoff, skoleinspektør