Jari Lappalainen

Iris is a shy and dowdy young woman stuck in a dead-end job at a match factory, who dreams of finding love at the local dancehall. Finding herself pregnant after a one-night stand and abandoned by the father, Iris finally decides the time has come to get even and she begins to plot her revenge.

Uuno Turhapuro's younger brother Peni arrives in Helsinki. Uuno helps his brother in management duties.

Uuno is forced to complete his mandatory military service when it is revealed that he only spent one day in the army in his youth. As is typical of the Turhapuro series his family and friends become closely tied in with these events. His friends Härski Hartikainen and Sörsselssön return to the army for a refresher course and by chance Uuno's father-in-law, Councillor Tuura is made the Finnish Defence Minister. In one of the most memorable scenes, Uuno's wife, Elisabeth, dresses as Uuno and substitutes him for a day as Uuno has an apparently urgent meeting (at a restaurant) and while becoming lost in the woods with a malfunctioning radio, Tuura accidentally declares war on Sweden.