After fleeing to Ojai, then Paris, and escaping to London, Josh and Sophie Newman are finally home, and after everything they have seen and learned in the past week, they are both more confused than ever.
While armies of the Shadowrealms gather and Machiavelli goes to Alcatraz to kill Perenelle Flamel, fifteen-year-old twins Sophie and Josh Newman accompany the Alchemist to England to seek Gilgamesh.