Chloe hoped that going home would keep her enemies away from her. She thought she could trust her parents to protect her, no matter how much they feared mermaids and the ocean. It nearly cost her life to find out she was wrong. Surviving a mad scientist and Noah's bloodthirsty relatives was only the beginning, however. An ancient creature is after her, one that's risen from its sleep to hunt her, and one that almost destroyed the world last time it awoke. To save herself and everyone she loves, Chloe's only chance lies in travelling to meet Ellie's mysterious teacher, Olivia, one of the elusive landwalker elders. But Chloe has trusted people before. She's tried to escape the madness that's chasing her before. And nearly everybody who's learned her secret has ended up wanting to use her or kill her. Will Olivia's betrayal be next?