Liverpool, 1891. Detective Sergeant Thomas O'Callaghan is a man haunted by failure. The gruesome murder of a young girl at Stanley Dock dredges up memories of the unsolved Ripper killings he left behind at Scotland Yard.
When Danish surgeon Sophia Amalie Steenberg is drawn into the investigation, her expertise reveals a chilling truth linking the killer to Liverpool's role in the transatlantic slave trade. As Thomas and Sophia delve into Liverpool's history, they uncover further sinister connections.
With another victim claimed and the killer's methods growing more depraved, the pair must race against time to stop a killer intent on leaving a trail of terror across Liverpool.