On Prometia, the Winx fall into the trap set up by Orion and Valtor. Fortunately, Stella and Flora manage to escape from the trap and transform in order to free their friends just in time. The Winx then creates a new temporary core of light for Prometia to save the star for the time being, by using a new spell: Cosmix Power Supernova. Meanwhile, on Iridia, Obscurum arrives at the star and transforms all the lumens of the star, including Lumilla, into staryummies.