An entire block of flats is in a state of excitement, and that's only because the Maier family has put their award-winning Hahn Otto on the balcony of their rented apartment. And now the animal wakes up the whole block morning after morning with a bloodcurdling Kikeriki. This disturbance of the peace naturally calls for the housing company, which sends its employee Franz Langmann to convince Maiers to find a new place to stay for Hahn. But the Maiers are not at all enthusiastic about this suggestion and strictly refuse to take Otto off the balcony.