Militante marxista, Rosa Luxemburgo foi uma das mais proeminentes representantes do partido social-democrata alemão. Em 1915, ela rompe com a sigla por esta ter apoiado a participação da Alemanha na Primeira Guerra e passa a lutar contra o conflito.
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.