There's a savage killer on the streets. The Prey is not mortal flesh. Someone is killing the vampires of London; someone is hunting them down and murdering them as they sleep in their daytime coffins; someone craves the destruction of every last drop of immortal blood.

James Asher finds himself faced with a bizarre and macabre case when he is employed to trap the killer and save the vampires.

He knows he has no choice, for night is the kingdom of the vampires, and when darkness falls there is nowhere in the world he, or his young wife Lydia, can hide from them...