The union point—a crystal embedded in Laverna's throne—begins to absorb the power from the guardians' necklaces. Elina tries to swim to her but still can’t reach her to rescue her due to the current still pushing her back up, and thus, she is forced to activate the necklace after all, turning her into a mermaid. Elina and her friend Dandelion learn that one of Fairytopia's guardians, Topaz, has supposedly been kidnapped. Max is lurking nearby, however, and threatens to release his magical poison into the water if Elina doesn’t hand over the Berry. Elina soon reaches Mermaidia and catches up with Nori, who has been unsuccessfully attempting to learn the location of the oracle Delphine so that Nori can ask her where to find Nalu.

Dahlia tells Elina that Laverna found a way to suck the powers from the fairy guardians' necklaces and transfer them to herself, stating that the "union point" would be its weakness. When they reach the surface, they find Nalu guarded by Max’s two Fungi henchmen and have Bibble distract them with opera singing while the two mermaids leap from the water to cut the seaweed ropes holding him. When Delphin gives Elina the pearl necklace, she says they will turn deep blue, then turn white one at a time. Nori easily out-swims Elina, but Elina takes to the air and skims along just above the waves to make the race more even.They must spend time in learning how to perform this in the Fairy School at the magnificent Crystal Palace. Knowing that Bibble can't live underwater, she would have to say goodbye to Bibble which he does not want to do. In the morning, as Azura is about to leave, she is kidnapped by a Fungus, one of Laverna's henchmen. The bubble takes them to the entrance of a cave filled with boiling hot thermal vents and then pops. Bibble gets ahold of some of the berries, while they aren't poison, they are one that makes the eater dance with yodeling, one that causes the eater to sing beautiful opera, and one that causes the eater to speak in a deep voice.

She explains that the rainbow in Elina's eyes means she's destined for great things, which Elina, who does not believe in herself, disagrees with. The plot involves Mariposa (Chiara Zanni), a butterfly fairy who loves to read and dream about the world outside her home in the land of Flutterfield – which is protected by their queen's magical lights.

The objects thrown by the main characters near the end of the film should not have moved as fast as shown or hit the Fungi as hard since they are underwater. She tells them to travel to the bottom of the Depths of Despair to find the Mirror of the Mist, which will lead them to him. She assures Elina that it’s possible to make it through by properly timing one’s passage with the eruption of the vents, having done it before, and leads them through. This amount includes seller specified domestic postage charges as well as applicable international postage, dispatch, and other fees.