In 1757, the second year of the Seven Years' War, Frederick II the Great stands at the gates of Prague. He has been trying to take the city for weeks, as the enemy commander Duke Charles of Lorraine is inside. Frederick has just defeated him, but the tide could soon turn against the Prussians, as new Austrian troops are approaching. None other than the famous master thief Andreas Christian Käsebier is to sneak into Prague to open the gates from the inside. As a reward, the king promises him freedom. Käsebier accepts the offer because he is tempted to steal an entire city. But by chance, Käsebier learns that the king wants to betray him. After a successful battle, he is put back behind bars for life. This doesn't suit the master thief at all, especially as he has just fallen in love with Katka in Prague.

The young architect Hannelore becomes part of the all-male brigade Fröhlich whose members are supposed to build houses at the Strausberger Platz in Berlin. The brigade men drink a lot of beer and are less than thrilled about the new girl. Hanne is the only one who is absolutely delighted with Hannelore. When he starts a drunken fight on May Day, he is arrested and accused of armed robbery. Hannelore immediately convinces the other men in the brigade to help Hanne.

1978 film by Erwin Stranka