1987: Nete Hermansen, a young woman brutally assaulted in her youth, sterilised without her consent by a fanatical surgeon, and banished to Sprogo, the island for outcast women is planning her escape and her vengeance. And soon people begin to go missing and no one - certainly not the police - knows why, nor that individual cases are connected. Today: Carl Mørck and his assistants Assad and Rose in Department Q are examining old missing persons cases and spot a disturbing pattern from 1987.