The Cuckoos(1949)

Original title: Die Kuckucks

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.