Esko makes a bet that he will marry the first young woman he encounters. This turns out to be Kirsti, who promptly turns down the proposals. But when she finds about the bet, she agrees to marry him in order to get her revenge.
Mattila's relatives Konstu and Fransi travel to Helsinki to meet their friend Kalle Liljepeki, who runs a failing general store in Sörnäis. The companions get Maiki, the daughter of the house, and Sundi, a forest consultant. A lot of misunderstandings arise and a story about the devil in Kalle's shop.
Sock manufacturer August Lampaanpää finds himself in financial difficulties due to the upkeep of his girlfriend Kyllikki Mattler, appeasing his wife, and opposing his daughter Vappu's plans to marry car mechanic Manne Hietikko.
