This follows Astrielle and her journey with the Winx and their battle against the trix.

New year, same Winx. Or so they thought. After finding herself at Alfea, with no memories of who she is or where she came from, Crystal Moon accepted the offer to enroll at Alfea school for fairies. She became quick friends with her dorm mates Bloom, Flora, Musa, Tecna and the one she shares a room with, Stella. They decided to give themselves a name, to celebrate becoming friends: The Winx. After a long year of learning, friendship and witches, The Trix attacked all of Magix. Now that they have been defeated and send to Lightrock to be reformed, Alfea is being rebuilt. Crystal and Palladium stay to help, and then head to Athryell, Palladium's home planet, to spend the summer there. But when they get back, ready for another year of learning, they quickly discover that this year won't start off as peaceful as they had hoped, when a mysterious girl emerges from the forest.