The clan's secret encampment has been discovered and burnt to the ground by the evil High King Goll. All hope seems lost as Jack, Finn and the clansmen who escaped Goll's clutches desperately try to stay one step ahead of Eireann's wicked ruler by hiding in the Forest of Roann. There, they hatch a plan to rescue their kidnapped friends from the Palace of Tara where they are trapped and find Finn's wife, Ruskalya who has mysteriously disappeared. Not only this but they must help Jack retrieve the sixth gemstone destined for the magical Amulet of Athlone that he wears around his wrist. This last enchanted jewel is all that our school boy hero needs to break the ancient curse that imprisons Finn's mother and keeps Eireann under Goll's rule. Now only a single banshee stands in his way to fulfill his destiny as Prince of Tara but that banshee is Serpentia, the most feared and dangerous of her kind.