Finley's nightmare is reborn in a place where many others his age have been petrified before him, at the start of analytic geometry class. Unique to Finley, his fear didn't come from a lack of understanding how to calculate proofs; it was triggered by the voice of his nemesis inside his head. Finley's last encounter with Hai was a battle for his soul that ended when Hai was reduced to a spirit form. And now, a year later, Finley can hear Hai's mad plan to retrieve the souls of his wife and son and rebuild his lost family. In a final attempt to rid his family of Hai forever, Finley and his half-sister Liffey travel to the land of their ancestry, the mystical Arcten Islands. There, they begin a dangerous quest that challenges their bravery and concludes in a way they never could have predicted.