Love blossoms between Rabah and her cousin Mosbah, but when a man who aids the French occupation kidnaps her, Mosbah's attempt to rescue her fails. As he gets arrested and sentenced to three years in prison, he vows revenge.
A story about three brothers, Petar, Angel and Vasil, each one joins the fight against fascism in his own way.
Professor Dimov is a diplomat who has been recruited as a spy by a foreign intelligence service. The suspicions fall on Dr. Belcheva. Major Kalinov is entrusted with the investigation of the case. He learns that she is Dimov's mistress. Paris, France. Dimov and Belcheva go out leaving a bag with secret documents in Belcheva's hotel room. Kalinov manages to retrieve the documents. After this incident Belcheva dies in hospital from poisoning. On board the plane Kalinov exposes the professor as a spy. Bulgarian counterintelligence officers arrest him.
