George Archer, Liz Oldfield and Eddie Hopkins have survived some rather frightening events in their lives, but things are about to get much scarier. They discover that vampires do exist, are intent on taking over London and ending the human race. Together with Sir William Protheroe, they must research ancient Egyptian mummies, a secret underground London gentlemen's club, and a well-known theatre actor to try and stop the vampires from overthrowing Parliament and taking over the world.