Willow Sertori is the daughter of Cleo Mcartney-Sertori and her husband, Lewis Mcartney. Willow loves her home country of Australia-especially the oceans, just like her mother had raised her.
Axel and Odessa Gilbert-Chadwick are the adopted kids of Rikki Gilbert-Chadwick along with her partner Emma Gilbert-Chadwick. Odessa is already a top-knotch swimmer like Emma while her brothers prefers boating with his other mum, Rikki.
Willow, Axel, and Odessa are best friends and do nearly everything together, along with Bela Hartley's daughter, Alice.
While Axel and Odessa are well aware of their mother's abilities (and are sworn to secrecy), Willow and Alice haven't a clue.
Whilst swimming-the children come across a volcanic like cave and knowing what will happen-Axel and Odessa lead the rest in. All on a full moon.
Now what happens when they're caught in the crossfire?