After a robbery, a gang of bandits led by Kulaus-Ramperi flees Helsinki on the Kuopio express train "Lentävä kalakukko" and tries to hide in the crowded train filled with music and singing. The cheerful conductor Saastamoinen protects the motley crew traveling on the train.

In this satirical rural comedy, the feared and notorious Kalle Kuikka threatens the peace of the region, which police chief Pappinen and fire chief Miettinen are trying to protect.