A valuable symbol of the British Empire’s wealth shows up in the form of an uncut diamond. It is a jewel ‘freed’ from the diamond monopoly of De Graal by one Daniel Judge, Captain Jackson’s untrustworthy older brother. Reid and Flight find themselves being drawn to the plight of a local craftsman defrauded of his work and income by a scam that is set to return H Division to the malign influence of Detective Inspector Jedediah Shine.

Death and violence comes to Whitechapel once again. Some decayed and murdered bodies are discovered in a slum tenement, and the advanced stages of the police divisional boxing championship reveals the vengeful ferocity to be seen within the ranks of the police force.