Rich-born, disinherited Swedish petty farmer Bertel Larsson's widow Lisa's sudden death orphans their brat daughters, teenage Tina and pre-teen Karen. Bertel's bitterly estranged, filthy-rich mother Viveka, who never bothered about he kids, now claims sole custody and plans to sell off the farm. Lisa's sister, student-pilot Hanna Ekberg, however bonds with them and agrees with their wish to stay at home. Reluctantly, she considers filing for custody, even if that turns off her lover and pilot-mentor Paul Thelen. Viveka orders her local lawyer, Lennart Sonderblom, to get her custody and permission to sell the farm, but he always has the hots for Hanna and secretly starts siding with the three mourning girls.