Gabriel Stone is back from Valta, but the adventure is just beginning! His friend Tahlita is trapped in Willow Creek with no memory of Valta. Gabe, Piper, and Brent are determined to reunite Tahlita with her father. Yet even as they do, Prince Oliver arrives asking for their help. Menacing forces known as the Solarians have kidnapped the Empress and Princess and are threatening the lives of humans everywhere. Along with talking tracker monkey, Finley, the friends battle vampire mermaids and a living, blood-filled lake in their quest to save the Empress and Princess. Even with cool new powers, Gabe discovers their strongest weapon is their friendship as they battle the Solarians and rescue a cursed white witch—who may be the only one who can save Valta.