'Jack Gordon and his sister Harriett made it through Fellwood Forest, but now they face the journey through the vast bog of Swampmere to the goblin fortress of Pitmouth. The Dark Prince is right behind them, at the head of a huge army. They’re all racing to retrieve the Key Song, the key to the magical barrier that keeps Morrigan imprisoned.
'Meanwhile, Anarra Settonett must act from afar to help Jack in any way she can, and also strive to protect Elvinidd, the dominion of the elves, from destruction. It is clear to Anarra now that Jack’s fate and the fate of Elvinidd, and all of Anwynn, are intimately linked.'
Source: Publisher's blurb.