Winx Club return to Alfea as teachers, where they learn about Believix, a new transformation that grant the ability to make someone believe in magic. In addition, Believix also gives 3 additional wings to make the form more powerful: Speedix (speed enhancement), Zoomix (teletransportation), and Tracix (visual aids). They also meet the Wizards of the Black Circle, a group of villains who are after the last fairy on Earth, in order to gain full power. Winx Club then travel to Earth to locate and protect the last fairy. With the help of Vanessa, they open a pet shop named Love & Pet that also doubles as their home and befriends Roxy, a girl who works at the Frutti Music Bar. When it is revealed that Roxy is the last fairy on Earth, Winx Club help defend Roxy from the Wizards. In the process, Roxy was able to discover her powers, gaining her Believix and help Winx Club drive away the Wizards. Defeated, the Wizards turn their attention to the White Circle, a magical ring in which the fairies from Earth were trapped. Winx Club eventually free the imprisoned fairies, foiling the Wizards’ plans once more. However, they now have to face the angry fairies of Earth, who are seeking revenge on humans for imprisoning them. Faced with such a powerful force, Winx Club are forced into an uneasy alliance with the Wizards as they now race to save humanity. Will Winx Club prevail?