Frau Römer's deceased husband once suffered from hemophilia and passed this defect on to his daughter Olga, who has recently become engaged to doctor Münchow, so Olga's mother feels it is her duty to inform the doctor about her daughter's rare disease. Münchow leaves Olga, who much later marry an older banker. They have three children. Allis well till one of Olga's sons has a serious accident.