An oft-naked male reporter decides to do an expose on "sexual widows", housewives who are neglected by their busy husbands. - This cheaper sex film is disguised as a report about green widows.

Railway employee Fritz Marr is not regarded well by his superiors. It is the year 1920, and trains regularly pass the railway hub of Erfurt to the East to secretly transport weapons for the fight against the young Soviet Union. Marr knows about this and wants to mobilise other workers to stop these illegal deliveries. To muzzle him, Marr is relocated to a remote rail work construction site.

After 1945, land reform forces Old Kraske to become an agricultural worker, but he continues to work on his own, flatly refusing to join any collective farming activities. He desperately wants a large-scale farm like Kimpel's in order to pass it on to his adored grandson, Tinko. When Kraske's son Ernst returns from a POW camp and gives his support to the new communal project, tensions arise within the family and little Tinko is caught in the middle.

Lifelong hard work for the count makes the servant Anton a cripple. Everybody calls him Crooked Anton. When, after the end of the war, the land of the count gets divided amongst the farmers, Anton receives a piece and hopes to be able to work freely. But an old debt and intrigue keep Anton and his family from finding peace. The farmers of the village begin to discover their own power when Annegret, Anton's daughter, leaves. Is a new beginning possible for Anton? This film paints an impressive panorama of the development of a minor village in Mecklenburg from the end of the war to the uprising of 17 June 1953.

The film "Die Unbesiegbaren" covers an episode in German history, in which the Bismarck government tried to mitigate the rise of the social-democrat movement.