Berlin, shortly after World War II. Five parentless siblings, led by the oldest sister Inge Kuckert, search for a place to stay and a basis of existence in the destroyed city. A bombed villa in the Grunewald seems to be the right "cuckoo's nest", but an alleged authorised disposal tries to drive the siblings out of the building. Fortunately, the friendly neighbor can help.

Peter's fiancee Maria is chronically lying and hides her little affairs. To change this, Peter bets that he is going to tell everyone the truth for 24 hours. The consequences are catastrophic.