There are five fiften year old siren teenagers named Lavender who has light purple hair and aqua eyes and fav color purple her bday is May 15, Rose who has light pink hair and light pink eyes her bday August 15, Kai who nickname is Red and gets called red has red hair and brown eyes whenever a mysterious creature what they don't know what it is he will think it is a creature from a bunch of legends like for example the "sharker biter" who hunts only boys, Luca who has blue hair and aqua eyes and his bday is May 1st, he is Lavender older brother by days and is the one who tries to convince the others from doing something stupid but mostly red, and Noah has green hair and green eyes he's the one who is chill, takes naps, eats a lot of food.

Rose and Lavender have been bestfriends since they were 8 and the family knows rose well and rose family knows lavender well too so they are super close and Rose started dating Kai since they were 14 and Lavender, Rose, and Luca all knew him and Noah since they were 12 and now they are all 15 and Rose and Kai anniversary is coming up soon in August on Rose birthday, They all have a lot of adventures together on their island or the human city. The human city knows about sirens another world for merfolks existence but some humans don't like them for being weird but others do everyone once lived underwater but then some wanted to live on land and the sea god punished anyone who would fall in love with a human to never return to the sea, some sirens have a island they live on and the group been on the island their whole lives its the size of the human city but bigger.

One day they are all sitting on the pearl beach, Kai and Rose leaning on eachother and Rose fell asleep on him while he watches the sea, Noah also taking a nap on the beach chair as usually and Luca and Lavender sitting beside eachother watching the sea and lavender than mentions how she been going to the human city recently and saw a siren artifact, and they should take it back.

Luca: It sounds risky though..