Sixteen years ago, the most powerful warrior magicians of the Magical Dimension sacrificed all in battle against a great force of evil. Now, the fate of the lost kingdom lies in the hands of one girl - Bloom, the Fairy of the Dragon Flame. Accompanied by her fellow best friends from the Winx Club, Bloom must face the greatest challenge of all: venturing into the depths of the dark dimension and fighting against the same evil in order to bring her parents back to life and finally solve the mystery of her origins. Will Bloom, Flora, Stella, Aisha, Musa and Tecna manage to defeat the most nightmarish of creatures and find the last king and queen of Domino, and will Bloom be able to save the lost kingdom and finally become its princess? The Magical Dimension's entire future will depend on the outcome of this battle...