When Mr Crepsley is called upon by the Vampire Generals, Darren and the snake-boy, Evra Von, leave the Cirque Du Freak and travel with him to the city. Whilst there, Darren meets Debbie and his life as a Vampire's Assistant fades into the background -- until corpes are found. Corpses drained of blood... Suspicious of Mr Crepsley's secretive bahaviour, Darren and Evra shadow him across the city and confront a creature of the night who may be the end of them all... Has Darren made a fatal mistake which will cost him the lives of those he cares for? And can he escape the lure of the Tunnels of Blood?