Katariina, an orphaned girl from the north, travels to Helsinki to live with her distant relative Mauri, who has been appointed her guardian. The unpretentious child of nature irritates, amuses, and charms Mauri, who is accustomed to high society, and his bachelor friends.
Irmeli, a fashion designer enjoying herself in Hanko, is urgently needed at her workplace. Ritva sets off to fetch her sister, but ends up by chance as a maid at Director Markka's villa, where Irmeli soon finds herself too. Director Markka and his nephew Reima are charmed by the clever sisters.
