During the Nazi occupation of Czechoslovakia, surgeon Dr. Franticek Svoboda, a Czech patriot, assassinates the brutal “Hangman of Europe”, Reichsprotektor Reinhard Heydrich, and is wounded in the process. In his attempt to escape, he is helped by history professor Stephen Novotny and his daughter Mascha.

The bloody hostility of two noble families on Corsica determines the destiny of two brothers who were divided – as Siamese twins born, successfully operated and apart grown up – by the love to a woman. In the revenge against the murderers of her parents they join.