The ultimate battle for Pearl Island has arrived!

Morgan is fighting for more than her safety, the future of her family, and the island is at stake. Cora, the sea-witch, has changed tactics.

But while Morgan and her friends are planning how to defeat the evil around the island, more of the legend comes to light.

And there is a surprising twist to both the past and the present ties the legend has to Morgan's life.

Will Morgan be the victor and defeat Cora? Or will the sea-witch claim the island and all who call it home?