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.

Berlin 1952, seven years after WWII. Four women are looking for a good man and happiness in the divided city. Their destinies are loosely connected through one person: the West Berlin dandy and womanizer, Conny.

A young married couple - both of them actors - work in the divided city of Berlin. Agnes, the young woman, is on location in East Berlin, and Jochen, her husband, works at the Westend Theater in West Berlin. This young marriage is in danger of breaking up as they vehemently defend their diametrically opposed views. The way they see politics, art and the world differs extremely.

After Jochen saves police officer Erich's life, the two men become close friends and Erich helps Jochen get a job working for Berlin's local train system. But Jochen falls into the hands of the beautiful West Berlin agent Ellen, who convinces him to participate in acts of sabotage against the trains. All of a sudden, Jochen is making a lot more money and even Erich's former girlfriend Inge becomes interested in him. But everything begins to unravel when Erich observes his friend's illegal activity on one of his nightly rounds.