February 1948. The struggle of decisive social forces for the heart of Europe.

On 20th of April 1945 the Soviet army launches its attack on Berlin. The end has come for Nazi Germany and Hitler decides to commit suicide. In Prague K.H. Frank (Nazi Secretary of State and Chief of police in the Protectorate of Bohemia a Moravia) discusses with his commanders how to transform the city into an impregnable fortress, but the Praguers do not intend to wait any longer. From the early hours of 4th of May people start assembling in the streets and tearing down German signs. On the next day, the 5th of May, the uprising begins.

A young princess arrives at her estate. She is bored by the welcoming ceremony and is quite happy to hear about the rebellious miller who refused to come to the castle. He lives with his mother and ward Hanička in an old mill. The miller is exempt from work, but he is obliged, if the lordship requests it, to accompany her with a lantern to the forest castle. The princess likes the miller and therefore uses his right...

Elén, a girl living with her mother and stepfather in a secluded forest, has a great singing talent. On her twenty-first birthday, she runs away from home and on the train, millionaire René falls in love with her. Their paths soon diverge, only to be reunited soon after. Violinist Pavel Sedloň falls in love with Elén, and although Elén does not love him, she is determined to marry him. At that time, René dies, exhausted from working on the operetta Srdce v delirium. However, he is saved at the last moment and everything comes to a happy ending when Oldřich Nový explains how the authors actually meant it all.