This year, the annual bike race will pass the highrise where little Max and Tüte live. It is a very hot day and the two boys try to come up with an idea to refresh the bikers. They finagle a huge water sprayer and all their neighbors get involved. But right at the crucial moment, a cat causes a huge accident and the would-be winner in the yellow jersey gets the worst of it.

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.