H2O: Just Add Water revolves around three teenage girls facing everyday teen problems with an added twist: they cope with the burden of growing a giant fin and transforming into mermaids whenever they come in contact with water.
The lives of teenagers Emma, Cleo and Rikki are forever changed when a magical, forbidden island gives them the power to turn into mermaids.
When a spaceship carrying pretty, teen aliens Zoey and Kiki lands in the quiet Australian surf town of Lightning Point, the girls have to befriend local surfiegirl Amber and let her in on their secret. But while the duo learns about Earth, surf and falling in love, the girls soon realize that they aren't the first extraterrestrial visitors.
