Master Tuula Vihervo teaches languages ​​at a women's college, where American-Finnish Charles Thompson Jr arrives to do an inspection on behalf of his father's college donor. The arrival of a guest and Tuula's infatuation causes a stir inside the college and in a restaurant in Helsinki, where Tuula starts performing as the singer Irina Meller.

A closed room mystery begins when an infamous tycoon is found dead in his bath tub. The famous police lieutenant Palmu is summoned to investigate.

Sergeant Friman is developing an automatic submarine detector that piques the interest of both, Swedish and Russian spies.

The colonel's wife's tin pints need to be cleaned up, and Sergeant First Class Körmy tasks two privates to do so.

The Minister of Defence asks sergeant Körmy to take part in operation, where the United States and Russia are to hand over their nuclear weapons launch equipment and codes to neutral Finland.

Set in early 16th century Finland, a knight Olavi Gideoninpoika meets Mirjam Raakelintytär and falls in love. Mirjami hides in a monastery disguised as a choir boy, but is revealed by a monk Rasmus, who also desires her, and is put on trial.

When a new man appears in Tuula's life, Jorma does not tolerate the idea and begins to yearn back for his ex-wife. They drift into a situation where both face a big choice that has far-reaching implications for the rest of their lives.

Based on Edvard Radzinsky's play, the story critically examines the difficulties of a Soviet film production.

Relations between Sweden and Finland come to near breaking point. When further negotiations led by President Mara fail, Sergeant Körmy interferes in the course of events.