Avalon and her twin brother, Adrian, are both Merpeople, A.K.A Mermaid and Merman. Their family suddenly move from their usual home without explanation, which worry the twins. They have to move to a land boarding school, which is full of Vampires, Werewolves and Witches. Or as they call them, "Supernaturals". This worries them both, since Supernaturals were great enemies of Merpeople many years ago. Desperate to hide their identity, they do everything they can to hide that they are Merpeople. Avalon and Adrian meet their three new room-mates, who they soon become good friends with. But, is something else in store for the twins?