Follow the siren call to Emilys magical new adventure! Can the spunky half-mer girl pass Neptunes test—and help humans and merpeople get along?Emily Windsnap is finally enjoying a swimmingly peaceful life on Allpoints Island, hanging out with her mermaid BFF, Shona, and her new friend Aaron half-merperson like herself . But their idyll is cut short when Emily learns that the Windsnaps and friends must return to their old home in Brightport, where construction projects are threatening a secret mermaid community under the sea. Neptunes mandate? No less than an interspecies intervention to bring merpeople and humans together, a task the imperious god feels the mixed Windsnap family is well suited for. There are just a few snags for Emily, however, like dealing with old nemeses Mandy and Mr.