Four years have passed since Reid bayed for Drake to end the life of Jedediah Shine. Four years that have seen the crime-fighting axis of Reid, Drake and Jackson split and isolated from one another. Drake has left London for Manchester to become the policeman - and man - he felt he could no longer be in Whitechapel. He is an Inspector himself now. Jackson has reverted to the man Reid plucked out of the Tenter Street brothel, a two-penny, sawbones, clap-doctor. And Reid has succumbed to his own shame and isolation, policing Whitechapel with a level of forensic detail and dedication that leads Chief Inspector Fred Abberline to fear for his old friend's mental well-being.Meanwhile, Long Susan has made good on her threats to both Captain Jackson and the dying Silas Dugan - she has separated from her husband, taken command of Duggan's criminal empire and turned it into a legitimate property empire of huge philanthropic ambition. But such aspirations are costly, as her loyal but scheming solicitor Ronald Capshaw knows only too well.All these resentments, fears and ambitions are soon forgotten, however, when two trains collide on the newly constructed bridge above Leman Street. It is a catastrophe which falls into Reid's world and demands explanation. His pursuit reunites him with Drake and Jackson and sets him on his own collision course with his past and with the secret crimes of Long Susan and Ronald Capshaw.