Winx Club begins their third año in Alfea and the girls learn about their unique Enchantix transformations, acquired por sacrifing themselves for someone from their own world. Meanwhile, Trix, previously banished to the Omega Dimension, escape with Valtor, a sorcerer partially responsible for the destruction of Bloom's inicial realm, Domino. They chose to cooperate and plan to invade several areas in the realm of Magix and seek vengeance on those who imprisoned them por stealing the magic treasures and power sources of each realm. It is up to the Winx Club to stop their evil plans!
