Emily Windsnap lives on a houseboat near the ocean but is forbidden to swim in it by her overprotective mother. When her school offers swimming lessons, Emily finally gets to try swimming and she learns that she is half mermaid. The journey takes her on an exciting adventure of friendship and fun.
When his trident pendant is stolen, Aaron embarks on a high-seas adventure, along with his best friends Emily Windsnap and Shona Silkfin, to retrieve it, learning the royal meaning behind this keepsake, which changes everything.
Neptune, King of the ocean, sends half-mermaids Emily and Aaron to the land of the midnight sun to investigate the source of the dangerous storms brewing in the ocean.
Vienna. 1936. Three young friends spend a perfect day together, unaware that around them Europe is descending into a growing darkness and that events will soon mean that they are ripped apart from each other as their lives take very different directions.
When she incurs Neptune's wrath by finding a diamond ring buried under rocks in the ocean, Emily is put under a curse that will force her to choose to be either a mermaid or a human and split up her parents forever.
After finally convincing her mother that she should take swimming lessons, twelve-year-old Emily discovers a terrible and wonderful secret about herself that opens up a whole new world.
Reunited with her merman father and now living on an island located in the Bermuda Triangle, twelve-year-old Emily accidentally awakens the fearsome kraken and also faces a bully from her past.