Stella complains about Flora's flowers in her room, and Tecna yells at her after she was saved from one of her plants.
After being confronted about her plants, Flora leaves to Black Mud Swamp to study her plants where they won't bother anyone leading Bloom to scold them saying that even Flora shouldn't live in a swamp. The Winx then go along to Black Mud Swamp in search for the Cheerful Gladioulus. They then meet up with the Undines (Water Nymphs).
The Undines reveal that the monster of the Black Island threatens them daily. They say they can't leave because their survival depends on a plant called Zillith, which can only be found on that island. The Winx decided to help them by going to the island to find an Undine named Lusiz who disappeared sometime ago and fight the monster. There they find that a Red Willow tree growing on the island makes all living creatures on the island fall asleep.
They find little Luzis, who tells them that the monster was actually a turtle which was sleeping because of the Willow and which was sleepwalking. The Undines took it for a monster when it would move its head in and out of his shell during its sleep. Bloom and Flora in combined efforts, remove the Red Willow. Flora uses her rapid growth formula which multiplies the Zillith leaves. The Undines are so grateful that they reward Flora a Cheerful Gladioulus.
- Tecna: "Your plant also managed to eat my notebook. Is there any way to get it back?" - Flora: "Get it back? uh, no. (giggles)." - Tecna: "What about a spell?" - Flora: "Whatever the ivy eats is pretty much gone." - Tecna: "GREAT!!!" - Flora:"I didn't think it would grow so fast, sorry." -Tecna: "What am I supposed to do?! Tell the teacher that a plant ate my homework?! Argh, yeah. She'll believe that."
(Rai English)
- Tecna: "Okay, I'll keep my cool, but I'd would really like to know what kind of seeds they were.
- Flora: "Uh, they were, um, Triple S's. (giggles)."
-Tecna: "Triple S's?"
- Flora: "Saqueiuseprolaverouswithda!"
- Tecna:"WHAT?!"
- Flora: "I didn't think they would grow so fast, I swear to you, I had no idea!"
- Tecna: "All right, Tecna, don't go bananas. Take a deep breathe, (breathes in and out). Now, let's remain calm."
"Flora's our friend you guys! So she made a couple of mistakes, that dosen't mean she should go live in a swamp!" - Bloom lecturing Stella and Tecna.