Masa Niemi

The musical comedy tells the story of two friends about Usko and Toivo, both of whom happen to have same surname, Lahtinen.

Traveler Severi travels to Helsinki to enjoy some culture, where he meets Sinikka and Simo, who run a buying and selling business. At a customs auction, he buys a painting that businessman Kehveli and his assistants also have their eyes on.

The old man at the Eirtola house warns the new maid Eriikka about the fate of Jenny, the summer girl. Jouko, a university student from Eirtola, arrives home for the summer and begins to court the pretty maid. At the cattle shed, Eriikka finds a box, the contents of which she examines together with Pastor Tuomo Ahomaa. The tragic fate of Jenny, the summer girl, is revealed.

Justiina Puupää drives her husband Pekka and his friend Pätkä to look for work. The two decide to make money the easy way and try to have an accident after first getting accident insurance. After trying their luck, they hurt their heads and in the hospital, the comrades see each other's more outrageous antics.

Pekka Puupää and Pätkä, who return to Helsinki from an unsuccessful variety show tour, are forced into refresher training, where they are trained as frogmen. During the diving exercises, the friends encounter the mermaid Helmi, whom they help into the bathtub at home, to Justiina's shock. The friends, who have become civilians, eventually end up on a plane bound for Suez, being cornered by UN soldiers.

Justiina pushes Pekka and Pätkä to take painting lessons after realizing that art can be a way to earn a living. With the help of the yard children, a painting is created that wins first prize at a contemporary art exhibition. In the meantime, the men, along with their assistant Miss Kaihokielo, have been charged with art theft. After the misunderstanding is cleared up, the Puupääs use the art prize money to convert the house's bomb shelter into a children's clubroom.

Two Finnish PI:s are hunted by a gang specialized to counterfeit banknotes from Malaga to Finland and Mallorca and back. The counterfeit money printing plates are desperately searched by the gang and our heroes try to hide from them by travelling to Mallorca, where some of the local hoods try to kill them and retake the missing plates.

The unlucky layabout Isarkar Keturi brings a criminal gang to heel with the help of his assistant Mikael. He frees Irma, the daughter of mining magnate Tömstet, from captivity and a forced marriage to Kurt. Irma achieves her dream of becoming a pop star, with Isaskar's help.