Kauno Laine

Vuokko takes shelter from a thunderstorm in a fishing hut and meets a mysterious man whom she suspects is the smuggler Rompan Eetu. Instead of reporting him, Vuokko decides to follow him to Helsinki to the smugglers' hideout on the condition that he agrees to turn himself and his comrades in to the police.

Due to the post-war housing shortage, Pirkko, who has nowhere to sleep, is given accommodation at the full-service guesthouse run by landlady Töttermanska. There she meets the other residents: student Eskoo, foreman Heikki, antique dealer Theodor, and businessman Roope, whose acquaintance with the beautiful Dolly draws the whole group into criminal activities.

The new idealistic welfare officer Helmi tries to improve conditions in "Sin Alley," but difficulties arise, particularly with the leader of the petty criminals, Jukka, whose son Reino also drifts into a life of crime.

Merchant Ville arrives in Malaga with his secretary Esa to meet Outsider regarding a valuable inheritance. Esa falls in love with Spanish beauty Carmen, who joins the pair on their trip to Morocco. Carmen's husband Juan also follows the group.

Pete and Runt set up a kindergarten at their home, and unknowingly end up taking care of a kidnapped baby.

Poke and Pena, two private investigators in debt, see an advertisement in the newspaper about Dr. Peltonen's disappearance and the promised reward for finding him. The boys retreat to investigate the case in a house they have rented in the countryside, which happens to be next door to the criminal gang that kidnapped the doctor. The gang's boss, 'Synkkä' (Gloomy), and his sister, 'Kaunotar' (Beauty), try to distract the boys by hiring them to guard their villa.

Merchant Ville arrives in Malaga with his secretary Esa to meet Outsider regarding a valuable inheritance. Esa falls in love with Spanish beauty Carmen, who joins the pair on their trip to Morocco. Carmen's husband Juan also follows the group.