Since her family moved to Cornwall, Lizzy's world has been turned upside down by the discovery that she has a long-lost brother, Kes, and even more amazingly that their mother is a mermaid. Now Lizzy and her new family must bravely battle the evil sea queen and her terrfying servant, for Lizzy has a powerful treasure and the sea queen will stop at nothing to get it. Exciting and full of dark mystery and suspense, ideal for girls of 8–10 who love stories with an edge.