At the start of a new school year at Alfea College for Fairies, Sylia, the adopted daughter of the Wizards of the Black Circle, reluctantly finds herself attending as a new student. She's not shy about expressing her dislike for it. To make matters worse, Sylia has to collaborate with the Winx on special school projects overseen by Alfea’s new History of Magic teacher, Daphne, who happens to be Bloom’s sister. Will they be able to survive the school year without Sylia causing any trouble and perhaps even become friends with her, or is it all just wishful thinking?