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.

This film, chronicling the last days of Czech resistance fighter Maruska Kuderikova (played by Magda Vasaryova), is based on her diaries. Though she was tortured and eventually executed by the Nazis, her diaries indicate that she was optimistic for the humanity of her captors and did not by any means hate them. Told with simple dignity, this film makes clear why Maruska became a national hero.