As King Henry and Waterboy go about their day, Waterboy.exe lurks in the dark, gaining allegiance from the secret and Elusive Shadow Serpent Gang, Who have been for the past few years have been attempting to overthrow the Watercunnan Kingdom from the inside, but never having the opportunity to strike. Now armed with power and weapons with a power that they couldn't comprehend, they begin the siege, Will Waterboy be able to stop them? Or will the Shadow Serpents take over Watercunna once and for all?
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.