Iranian bureaucrat Bozorg Agha is the head of a very powerful mafia syndicate who had a strong role in the coup d'état against Dr. Mohammad Mossadegh's government on 18 August 1953. The son and daughter of two of Bozorg Agha's henchmen, Shahrzad and Farhad, are about to get married. During the coup chaos, Farhad gets arrested and sentenced to death. Bozorg Agha uses the influence he has amongst the coup heads to set Farhad free on the condition that Shahrzad agrees to break her engagement to him and marry the nephew of Bozorg Agha, Ghobad. Ghobad is already married to the sterile daughter of Bozorg Agha, Shirin, who does not take kindly to her husband's growing love for his second wife. The conflict created by these circumstances as well as the political activities of Farhad set the background for the story. The series follows the troubled lives of the people under the control of Bozorg Agha's rule as well as the ongoing rivalry between Bozorg Agha and other corrupt political leaders of the time.