At long last reunited with his dad, Will now spends his days exploring the "land of the second sun," decoding the cryptic glyphs on its three mysterious temples-or eyeing the wild animals with renegade girl Elliott.

But an army of darkness is on the march. And the ruthless Rebeccas have once more cheated death. With a corps of cold-blooded Limiters at their command, they're determined to hunt Will to the very innards of the earth.

This time, who won't escape with their life?