The film focuses on the perpetrators of the Indonesian mass killings of 1965–66 in the present day. The genocide led to the killing of almost a million people, ostensibly for belonging to the local communist community. When Suharto overthrew Sukarno, the President of Indonesia, following the failed coup of the 30 September Movement in 1965, the gangsters Anwar Congo and Adi Zulkadry in Medan (North Sumatra) were promoted from selling black market movie theatre tickets to leading the most powerful death squad in North Sumatra. They also extorted money from the ethnic Chinese as the price for keeping their lives. Anwar is said to have personally killed 1,000 people.