After investigative journalist Lisa Wallace publishes an article about her mother's murder, other girls start to disappear; she and Detective David Burkely investigate across Ireland, searching for the missing girls while the killer taunts Lisa. Inspired by true events.

Abbie Campbell is in prison for murder, she stabbed her sleeping husband. The background to the brutal act was never clarified, Abbie had refused any statement at the time. Criminal psychologist Cathrin Blake has to prepare an expert opinion on the young woman.