Bloom, Stella, Mike, and Vanessa have just arrived at Alfea. Mike and Vanessa can't cross a magical barrier as only magical beings can. After showing them images of Alfea, Stella teleports Mike and Vanessa back to Earth. Griselda, the head of discipline, is registering new students at Alfea, and only takes those on the list, so Stella tells her that Bloom is Princess Varanda of Vallisto. Griselda dislikes Stella for destroying the potions lab with an unauthorized spell last year (she was trying to create a new shade of pink). It is mentioned that Stella is the princess of Solaria, as many of the fairies at Alfea are the princesses of their realms. Griselda tells the class that if they break the rules once, they get turned into a frog. If they break them twice, their magic priveleges will be suspended. If they break them three times, they will be expelled.
The headmistress of Alfea is Miss Faragonda. Bloom and Stella's roommates are Flora, Tecna, and Musa. When they give Bloom a tour of Magix, Knut notices them and calls Icy, the leader of the Trix, who tells him to take Stella's scepter and crush her into fairy dust. Bloom narrowly avoids Knut, and the Trix - Icy, Darcy, and Stormy, three senior witches from Cloud Tower - step out of the shadows. Darcy finds Bloom and brings her before the others. Icy uses an ice crystal attack, Darcy uses sonic waves, and Stormy uses a tornado before Icy freezes Bloom.
Then Stella, Flora, Musa, and Tecna appear and transform. Tecna, Musa, and Flora defeat Knut, but the Trix gain the upper hand when they fight, so Stella teleports away with Bloom and the others.
When Stella unfreezes Bloom, she accidentally reveals her true identity to Flora, Musa, and Tecna. When they get back, Bloom reveals her true identity to Faragonda and Griselda. Griselda wants to turn her into a frog but Faragonda is willing to give her a chance. The two wonder who Bloom could be since magic beings were thought to vanish from Earth long ago.
- First appearance of Flora, Tecna, Musa, Faragonda, and Griselda