The Winx Club begin their third and final year at Alfea. As Charmix fairies, the six best friends learn of their full-fledged fairy form, Enchantix, that can only be achieved when a Charmix fairy rescues someone from her own home world and shows great courage, bravery, self-sacrifice, and compassion in doing so. Meanwhile, in the Omega Dimension, the Trix find and release a power-mad and vengeful sorcerer named Valtor, who has a tragic connection to Bloom and her true past, as he was directly involved in the destruction of Bloom's home world, Sparks, seventeen years ago alongside the three Ancient Witches. The season focuses mainly on Bloom discovering the truth and whereabouts of her birth parents-Oritel and Miriam-and how to destroy Valtor once and for all.
Previously banished to the Omega Dimension, the Trix are able to escape with Valtor, an evil sorcerer partially responsible for the destruction of Bloom's home world, Sparks, seventeen years ago. They choose to forge an alliance and plan to invade several areas in the realm of Magix and seek vengeance on those who imprisoned them by stealing their exceptionally strong, magical and mystical treasures and immeasurable power sources of each realm. With their newly strong Enchantix powers, Flora, Stella, Layla, Tecna, and Musa are able to use strong, incredible power and can miniaturize themselves at will. Bloom, however, cannot miniaturize herself due to the fact that her Enchantix is not complete. The Winx begin their third and final year at Alfea, learning about their unique Enchantix transformations, acquired by selflessly sacrificing themselves for someone from their home world (or even everyone from every world, in what ends up being Tecna's case) and showing great bravery and courage in doing so. With no one from her home world to save, Bloom must acquire her Enchantix form and tremendous power on Pyros, the island of dragons. She also learns more about her home world of Sparks, as well as the truth about where her birth parents, Oritel and Miriam, are.
Note: In The Nick Dub, although both One-Hour Specials featured the Magic Charmix transformation, this season featured the original Fairy Transformation