Female journalist Arezoon Rahimmi 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 sixteen women between 2000 and 2001.