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.
Helena, a beautiful school teacher in a countryside hamlet is just going to marry her childhood friend Erkki, but a day before the wedding her first love Jari arrives to the scene.
Kirsti works as a reception assistant to Dr. Varjo and is secretly clinging to the doctor's son, Eino, who is studying to become an architect. Even though the film reflects early social problems and class jokes, there is no humor about describing everyday life.
