Darren Shan, the Vampire's Assistant, gets a taste of city life when he leaves the Cirque Du Freak with Evra and Mr Crepsley. At night the vampire goes about secret business, while by day Darren enjoys his freedom. But then bodies are discovered ... Corpes are drained of blood... The hunt for the killer is on and Darren's loyalties are tested to the limit as he fears the worst. One mistake and they are all doomed to perish in the tunnels of blood...