Aluna and Hoku, Kampii from the City of Shifting Tides, and their friends, Equian Dash and winged Aviar Calli, are determined to stop a war. The maniacal ex-scientist Karl Strand is planning to conquer the world with his enormous army of tech-enhanced soldiers-- unless the four friends can get to Strand first. Aluna's plan is dangerous: pose as Upgraders and infiltrate the army. But the enemy isn't what they expected and the strategy begins to crumble....

With Everland and Umberland destroyed, Gwen, Pete, and Alyssa and the other survivors have taken refuge in Evergreen Village in the forest, where they plot to assassinate the Bloodred Queen, while trying to avoid her monstrous creations, and Doc works on his cure for the Horologia virus--but with the Queen of England dead, and the King of Germany either dead or hidden away, who can they trust to save their devastated world?