Darren Shan, the vampire's assistant, is forced to march to Vampire Mountain where he will be judged by the vampire princes. Darren Shan and Mr Crepsley make a long and dangerous trek to the vampire's stronghold in the mountains. The trek is a test of skill and endurance - one which sees Darren's vampire nature develop, and a new understanding of the mysterious blue-robed servants of the sinister Mr Tiny.

Gavner Purl makes a welcome return when he joins Darren and Mr Crepsley, but they face more than the cold on their way to the vampire princes - the vampaneze have been there before them... Will Darren's meeting with the Vampire Princes restore his human nature, or turn him further towards the darkness...