Baron Jan Dolanský is a childless widower, thus he showers his love and attention on his nephew Max. Max, however, has become over-sensitive and so the baron, fearful of the future of his line, decides to find a strong, healthy bride for him, without regard for her origins or education. He finds this girl in Madla, the oldest of twelve children of the widow Lísková. At his castle, the baron tries to turn Madla into the perfect young lady who would be suitable for Max. His endeavours are successful. Max is in love but he behaves coolly towards Madla since he is under the impression that his uncle brought her there for himself. The wealthy, childless farmer František Rybka yearns for children. When he cannot have his own, he seeks the services of a match-maker and marries the widow Lísková. He also longs to see the twelfth child from his new family settled in a good marriage, thus Lísková sets out to visit Madla. During a banquet at the castle, Max discovers that Madla had been destined to become his wife from the very beginning and he tells her of his love for her. Shortly after the wedding the couple are blessed with two children, to the great joy of the grandfather, Baron Dolanský.

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