Divided by their society into Wanted and Unwanted at thirteen, estranged twin brothers Aaron and Alex have both run into trouble--as mage of Artime, Alex must defend the island from attack, while Aaron continues to scheme to take over the islands and get rid of the Unwanteds altogether.

Alex and his friends from Artime are stranded on a newly-discovered island, and they are not alone, while in Quill, his twin Aaron's power base grows as he joins with an unlikely ally in a risky plan to finally conquer Artime.