London 1850. A city of contrasts. Of scientific marvels, poverty, disease and death.
When Detective Sergeant Harry Pilgrim discovers the corpse of a Jewish woman in a Hackney cab, the case seems straightforward - until the only suspect is found murdered in his cell. Pilgrim is hindered in his investigation by his own dark past - a dead son and a missing wife - and also by the well-meaning interference of Charles Dickens, who is serialising Pilgrim's adventures in his journal 'Household Words'. The case turns into a deadly game of cat and mouse. But who is the cat and who the mouse?