It is 1888 and Queen Victoria has remarried, taking as her new consort Vlad Tepes, the Wallachian Prince infamously known as Count Dracula.
 
Peppered with familiar characters from Victorian history and fiction, the novel tells the story of vampire Genevieve Dieudonne and Charles Beauregard of the Diogenes Club as they strive to solve the mystery of the Ripper murders.