When monster-hunter Malcolm MacFarlane comes across the gruesome aftermath of a ritual murder in a London church, he enlists the help of magician-scribe Simon Archer and alchemist extraordinaire Kate Anstruther. Studying the macabre scene, they struggle to understand obscure clues in the ancient Egyptian hieroglyphics carved into the victims heart-as well as bizarre mystical allusions to the romantic poetry of William Blake. One thing is clear: Some very potent black magic is at work. But this human sacrifice is only the first in a series of ritualized slayings. Desperate to save lives while there is still time, Simon, Kate, and Malcolm-along with gadget geek Penny Carter and Charlotte, an adolescent werewolf-track down a necromancer who is reanimating the deceased. As the team battles an unrelenting army of undead, a powerful Egyptian mummy, and serpentine demons, the necromancer proves an elusive quarry. And when the true purpose of the ritual is revealed, the gifted allies must confront a destructive force that is positively apocalyptic.