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Leopold Pasemann, owner of an auto parts factory, is looking for an heir. Since he has no children of his own, he makes an offer to his late brother's two sons and daughter: each will receive a check for 5,000 marks. Whoever makes the most of it in a year will be appointed as his universal heir. While Gustav works on an invention and Christian opens an advertising agency, Hannelore starts her own fashion salon. She falls in love with Hans Promm, who works as a department head for her uncle. What she doesn't know, however, is that her uncle has tasked Hans with monitoring what the three of them do with the money.