When people on Earth start believing in magic, the Winx obtain Believix, a power that will help them defeat the Wizards of the Black Circle. When the Wizards put Roxy in the Black Portal, it's up to the Winx to stop them.
Bloom becomes involved in a fight between a magical fairy Stella, and a gang of trolls headed by Knut the Ogre. Bloom takes Stella home and there Stella introduces her to the world of Magix, where the College of Alfea for aspiring fairies is located.—Anonymous