Emma Gilbert , Cleo sertori , Rikki Chadwick are your best friends and you are all best friends y/n has a sister named Charlotte who wants to be just like her but she doesn’t know that all of y’all are mermaids  we all live in Australia where the ocean are clear everybody’s excited for school to be over it’s the last day of school but there’s a girl that is so annoying and always try to make fun of us, but we always make her feel embarrassed, and her name is Sophie