Now that Lia has found the missing pages of the Librum Maleficii et Disordinae, or the Book of Chaos, the end of the Prophecy is in sight. While Lia tries to save James from Alice's sinister grasp, she unlocks the prophecy's final mystery and a caveat that may put an end to any hope of ending the prophecy; to close the Gate to the Beast forever, Lia must convene in an ancient ritualistic ceremony with all four keys at Avebury. But that's not all. Alice, as Guardian, must be there as well.