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The Spanish deep South, 1980. During the annual festivities, in a forgotten town on the Guadalquivir Marshes, two teenage girls disappear. Juan and Pedro, two homicide detectives from Madrid with deep divisions in their ideology, are sent to assist the local police with the investigation. They must put aside their differences to untangle a web of intrigue, fed by secrets and lies which the locals refuse to give up. With their careers at stake and before more victims are claimed, time is running out to solve the case and face whoever has terrorized the community for years.