The Winx team goes to the most terrible and warlike planet in the Magics dimension, Warhorr. On it, the fairies need to find the source that emits the strongest magic, and find out how dangerous it is for other magical creatures. But the compass leads them to a sullen and awkward teenage girl who has no idea that she has powers. Is this young lady really the owner of such powerful magic? What gift is hidden inside this girl? Should we be afraid of him? And what secret are the inhabitants of the planet keeping? The Winx fairies will have to find answers to all these questions, discover the hidden facets of their skills and find a new transformation for them.