Ryszard Ochódzki receives a special assignment for UB - infiltrating the "Solidarity" party branch in Suwałki. His arriving there coincides with the imposition of martial law on Poland.

Episodes of the Warsaw Uprising as reported by the insurgent radio station "Błyskawica," illustrated with archival photographs and photos of contemporary Warsaw. Professor Tomasz Strzembosz talks about the specifics of the insurgent struggle and the construction of the station's transmitter, which was constantly moved to different buildings in the city center during the fighting. The film attempts to show what "Błyskawica" meant to Home Army soldiers and the residents of Warsaw and recounts what the station reported on, namely the general situation in the city during the uprising, problems with weapons, food, and water, the insurgent postal service, the explosion of a tank trap, the work of ad hoc hospitals, teenage liaison officers and guides in the sewers, and the execution by the Germans of an entire unit that had surrendered.

A young aspiring violinist unwittingly becomes involved with a criminal gang.