The world is not what it seems. There are vampires, demons, shape changers, mermaids and sirens. The underworld is real and the people of twenty-first century England don’t know a thing about it.
The Commission is tasked with seeing to it that the people of England can continue to enjoy this state of blithe ignorance. Their chief enforcers against demonic wickedness are Major Jameson, formerly of the Guards Regiments, Gaston, a Jamaican who was formerly a sergeant in the Paras—and the vampire Karla, who has been (quite unwillingly) recruited to their service.
They are glad they have Karla, though, however surly she may be. Without her, they would be hard-pressed to handle the other vampires, witches, shapechangers, sirens, wielders of cursed rings—all the monsters that comes their way in the darkness of London nights.