Sydän toivoa täynnä

1943: Nine-year-old Eero whose father is killed during the war is brought to Sweden to foster parents to his protection like thousands of other Finnish children. Eero feels lost, particularly as his foster mother Signe behaves very unfriendly. She was expecting a little girl and still mourns for her daughter who drowned in the sea.

Uuno Turhapuro's younger brother Peni arrives in Helsinki. Uuno helps his brother in management duties.