Alfea celebrates the inauguration of the new school an when the party is interrupted par Icy, Darcy and Stormy, the perfidious Trix. The Winx, without Bloom, are forced to remedy the confusion created par the witches who, having ruined the party, steal a powerful and mysterious object. Meanwhile, Bloom is on Domino, experiencing the best moments of her new life as a princess. She finally found her parents, and Sky asks her to marry him. But not all that glitters is gold; the Three Ancestral Witches, in fact, come back to haunt Stella, Layla, Tecna, Musa, Flora and Bloom. Moreover, Erendor, Sky’s father, forbids his son to marry the princess of Domino. A dark secret lies in the realm of Eraklyon. Meanwhile, with the help of Trix, the Ancestresses are able to find the arbre of Life that holds the positive and negative balance of magic. With a powerful spell, they break this balance and suck all the good energy from Magix. Bloom and her Friends find themselves powerless and forced to again confront the witches, the symbol of all evil. Will our Heroes find a way to restore balance in the Magical Dimension? And what is the secret that separates Sky and Bloom? Will their l’amour survive this new test? Between hilarious gags and moments of real magic, the Winx return to fly. Erendor - Sky's father is a man tormented par guilt. He abandoned Oritel after promising him that he would protect the kingdom of Domino (Sparks). This betrayal took care that the Ancestral Witches could destroy the planet of Erendor's best friend, Oritel. Now Erendor lives in remorse. When Sky decides to marry Bloom, Elendor forbids Sky to keep on seeing Bloom and tells him the sad story. Sky's father hopes this will relieve him of his guilt. Elendor promises to protect Bloom and regain Oritel's friendship, respect and the l’amour of everyone.