The final battle for the underwater kingdom has arrived. The royal merfolk and the creatures they command, along with eight human girls and the Korhonen Family are all that stand between the most hideous and powerful evil ever to roam the waves. Hermit Crab Queenie and her valiant tribe of Hermies, Dane and Alban the seabirds, the courageous whale pod with Merrilyn’s precious whale calf ‘Blue’ will all put their lives on the line in a quest that seems impossible to fulfill.