Fashion designer Rüdiger falls in love with Italian countess Vera, who was injured by him in a car accident. Just before their wedding they find out they are brother and sister. The wedding is cancelled, and Vera returns to Florence in a state of shock.

When the beautiful dentist's daughter Brigitte wants to get married, her widowed father Dr. Robert Stegemann hears alarm bells ringing. The future husband, the father is certain, will destroy the harmonious father-daughter relationship. Besides, he surely has nothing but bad intentions! To save what can be saved, Stegemann tries everything to discredit his future son-in-law. However, he does not succeed, as Robert, the name of his daughter's beloved, behaves in an exemplary manner and withstands the jealous attacks of his father-in-law, who fears for his only daughter.