The Winx Club, who are now famously known for their heroics, must soon battle a new evil called the Wizards of the Black Circle that are currently searching for the last fairy on Earth. Meanwhile, a new student Clarice plays a mean prank on Flora and frames her friend Alice which they must also deal with. The girls learn from Faragonda that there are an infinite amount of higher fairy levels after Enchantix, the next one in particular being Believix, which can be used to reach out to people's hearts and help them believe in fairies. During a fight with the Wizards, the Winx discover their Enchantix powers are too weak and they must earn Believix to combat them.