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Spouses Vojta and Růžena Koskub are an ideal couple: they both love each other and are both doing well at work. But six months after their wedding, they appear before the divorce court. The reason? Růžena refuses to do all the housework herself. In addition to their main jobs, she and Vojta have other work responsibilities. Růžena draws illustrations for a tree atlas, Vojta writes a book about after-school child care. Neither of them has time for the household. The sitting judge, Mack, can't get the quarreling pair of teachers out of his head, so the man decides to give the Koskubs a well-meaning lesson in marital cohabitation. The two married couples find themselves together at a summer cottage, where men and women can demonstrate what they think is right. But it won't be easy for anyone...