International haulage tycoon TP Swift arrives in town to acquire an ailing shipping line, accompanied by a team of private detectives, who proceed to cut a violent swathe through the borough on a mission of vengeance. As Reid focuses on the murder of an engine inventor, Jackson and Susan's past comes back to haunt them, bringing their future in Whitechapel - and their very lives - into question.

Reid is adrift, his team in pieces and Leman Street shaken to its foundations following recent events. A kidnapping offers him cause to assemble his men and tackle the white slavery ring operating in their midst. But Reid is gripped by a growing obsession that this leads back to the terrible secret from his own past.