Mansour (Mahmoud Abdel Aziz) is sentenced to death by hanging for his intelligence with the Israeli entity before the October War, so intelligence officer Muhy (Farid Shawqi) is assigned to investigate the matter, where he decides to devise a plan to replace the Egyptian officer Izz al-Din in place of Mansour "the spy", using the big similarities between them so that he can obtain important information and secrets about the Dimona reactor, and Izz al-Din begins to lives as Mansur among his family until Sahar (Possi) his girlfriend starts suspecting Mansur and tells the Israeli intelligence officer, Abu Joudeh (Yahya al-Fakhrani), and finds out, Izz al-Din is exchanged with Mansour, whom his father kills for betraying the homeland.