Dr John Dee has destroyed Paris in his attempt to find Nicholas Flamel and the Newman twins. They still have the missing pages of the book of Abraham the Mage, which the Dark Elders need for the Final Summoning. They will not rest until they are in power and the human race has been destroyed. Flamel knows he must protect the children and the precious pages. For this he must rely on Clarent – the sister sword to Excalibur. But the sword’s evil power makes it nearly impossible to wield without darkness seeping into one’s own soul. To protect the twins and defeat the Dark Elders, what price must he pay?