It is 1888 and Dracula has married Queen Victoria and turned a large percentage of the English population into the undead.

Peppered with familiar characters from Victorian history and fiction (Dr Jekyll, Oscar Wilde, Swinburne, John Jago), 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.