Katarina Diezmann (Gudrun Landgrebe) is generally happy with life. The well-known art expert has a senior position with the auctioneers Wegener. She finds her profession entirely fulfilling - and, in her view, it is the perfect substitute for a relationship. However, the tranquillity of her life is ruined forever one day when a little Brazilian girl appears at her apartment door and greets her cheerfully as Aunt Katarina…