Inspector William Monk: In search of justice he will not stop until he has found the truth. 1864: When the body of a brutally mutilated body of a woman is found on Limehouse Pier Monks enquiries into her death unearth a suspicious connection between the victim & Dr Lambourn a recently deceased scientist & staunch supporter for a new pharmaceutical bill aimed to regulate the sale of opium. Investigating further Monk learns that Lambourns widow refuses to believe that her husbands death was suicide; she is convinced that he was murdered by government officials intent on keeping the lucrative trade of opium flowing. With pressure mounting for the police to find the Limehouse killer Monk is propelled headlong into an investigation that will delve the darkest depths of the opium trade & threatens to expose corruption in the very highest echelons of society...