The series tells the story of three girls - Emma, Cleo and Rikka, and later also Charlotte and Bella, who accidentally discover the magical cave and acquire the ability to change into a siren in 10 seconds after each contact with water. Their lives have become very complicated since then. They want to keep their secret secret, but they do not always succeed. Girls help a few trusted boys like Lewis and Will. They must also be careful during the full moon, because the action of the moon is dangerous for them. The action of all episodes takes place in the city of Gold Coast, Australia.
