Crime drama set in Victorian London. Jack the Ripper may be fading into memory, but London has found no peace. DI Reid investigates the assault of a policeman.

Jack the Ripper may be fading into memory, but east London has found no peace. An investigation into the assault of a policeman leads DI Reid and the men of H-Division to the newly-emergent Chinatown, where Jackson discovers evidence of a new and devastatingly powerful opiate. Reid fears a new kind of hell is to be released onto his streets.