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Female journalist Rahimi travels to the Iranian holy city of Mashhad to investigate a serial killer targeting sex workers. As she draws closer to exposing his crimes, the opportunity for justice grows harder to attain when the murderer is embraced by many as a hero. Based on the true story of the "Spider Killer" Saeed Hanaei, who saw himself as on a mission from God as he killed 16 women between 2000 and 2001.