Aarre Koivisto

After ending up in an orphanage, Olavi sets out to find his mother. While playing the violin on the street, his exceptional talent catches the attention of a music school professor, who takes him under his wing.

Lissie is a pickpocket who escapes from the police by pretending to be the wife of the absent-minded Leopold. Leopold falls in love with the young woman, but Lissie is more interested in the valuables she finds in the wealthy professor's apartment.

Pekka and Pätkä work as inventors. Pätkä accidentally takes a photograph of bank robbers, who begin to track down the photographer. Soma Koivu, the former secretary of the property manager Kiivas, and police officer Antero Kangas help Pekka and Pätkä catch the robbers at a film studio where Pekka is working as a stand-in for Superman.