After their successful May party, now the Lehmann family want to throw a New Year's Eve part with punch. Wilhelm's sons Franz and Paul are brigade leaders at a chemical factory. One of their brigades consists largely of fanatics of high culture, while the other consists of sports fanatics. But the rival brigades must work together in order to throw a successful New Year's Eve party for the factory, since the occasion requires both elements: sports and culture.

It is the 65th birthday of Wilhelm Lehmann, foreman of a chemical company. All members of the large family are expected. Preparations are also being made in the company: Wilhelm is to be awarded the »Labor banner« and, as every year, the sons are responsible for the may bowl. But instead of family members, telegrams with rejections flutter into the house.