Despite Thomas Pitt's success in the Whitechapel case, the secretive Inner Circle prevent his returning to Bow Street police as Superintendent. Pitt's next task for Special Branch is to investigate Charles Voisy - the corrupt Inner Circle man Pitt defeated in court - who is standing for election as a Tory MP. Pitt must obtain information to stop Voisy's climb to political power. Then Pitt is ordered to Southampton Row, scene of the hideous murder of a spiritual medium. As the link between the spiritualist and political figures is revealed, the whispers of scandal grow louder. And with Charlotte in hiding for safety, Pitt must turn to his sister-in-law, Emily, to help him solve one of his most high-profile cases yet...