Having chosen to join "the Dark," Sebastian Parker faces his biggest challenge yet.

How will Sebastian cope having joined up with Arturo? Is Arturo even truly the Dark? Will Sebastian fulfil the prophecy by embracing the Dark himself?

What of Bates taking over the Agency and his sinister plans for the Necros?

And in the South, will Declan keep his knowledge of the "Outsiders" to himself, or will the Old World finally awaken to the New?