Melody had taken off her dress and was curled up on her bed as she felt like she couldn't fit in anywhere. She looked at the locket she found and decided to hold onto it.

"Oh, sweetheart, I'm so sorry." Ariel frowned to her daughter.

"What's wrong with me?" Melody asked through her tears.

The kids frowned to their cousin as they came to the door.

"Oh, nothing's wrong with you." Ariel comforted.

"Mom... I'm the Princess of Disaster!" Melody sulked.

"No, you're not." Estelle soothed her cousin.

"Being a teenager is hard... And all kids your age... Feel a little awkward..." Ariel comforted, it was a little hard since she never really got to grow up with her own mother, but Atticus's mother did help whenever necessary during visits over the summer. "And..."

"Melody..." The girl said her name once she uncovered the locket and saw her name on it. "What is this? My name's on here!" She then took the locket and opened it up to see a golden glow and heard a beautiful song which showed the land of mermaids with it in a bubble. "That song... Where have I heard it?"

"It's so amazing." Estelle smiled at the image the bubble showed.

"It's Atlantica. With merpeople and everything," Melody said in amazement. "Mother, you always said it was just an old fish tale."

"Where did you get this?" Ariel gasped as she took the locket from her daughter.

"I... I found it..." Melody said softly.

"And, uh, me and Felicity might have helped her find it." Estelle added.

"You went over the wall, didn't you?" Ariel asked.

"Actually, we went under it," Melody clarified. "I hate that stupid wall."

"Melody, you know you're not allowed in the sea." Ariel reminded.

"But why? And why does that locket have my name on it?" Melody asked her mother.

"Melody, listen to me." Ariel frowned.

"You're hiding something from me..." Melody frowned back as she stood up on her bed.

Ariel looked soft for a moment before she scolded her daughter. "You deliberately disobeyed me! I never want you going out there again, do you hear me?! It's dangerous in the sea!"

"Aunt Ariel, can you blame her?! After all, she's just like you!" Estelle told her aunt.

Felicity cupped her mouth as Estelle spoke out like that.

"She broke my rules, and you shouldn't speak out like that, Estelle." Ariel told her.

"I'm sorry, Aunt Ariel, but Melody just seemed so happy out in the sea." Estelle replied.

"You all shouldn't have gone out there..." Ariel frowned. "It's dangerous out there."

"How would you know?" Melody cried out angrily and soon swiped the locket before running out of her room and crying. "You've never even been in it!"

"Melody, wait!" Estelle called out.

Eric soon opened the door and watched as his daughter ran out of the room and came in with the other parents.

"Oh, no..." Ariel frowned as she soon sat down on the bed.

"Um, we should go." Akito said as he and the others left.

"Ariel, darling, we knew this day would come." Eric soothed his wife as he sat down next to her.

"Oh, Eric. You're right," Ariel sighed to him. "It's time I trusted her with the truth."

"You never told her?" Mo asked.

"I was always waiting for the right time." Ariel replied.

"Well, you did a good job of that..." Cherry muttered.

"Not helping." Atticus replied.

"Who said I had to help?" Cherry replied.

"Cerise..." Forte frowned to her.

"I guess I should've told her from the beginning." Ariel frowned.

Meanwhile with the kids...

"Melody? Melody! Melody, where are?" The kids called out as they went to find their cousin.

"Guys, I found her!" Felicity called out.

"Oh, thank goodness." Estelle sighed.

"Oh, now, child, it's gonna be okay," Sebastian told Melody as she stormed off to a boat in the water. "You know, when I was a teenager you couldn't get me out of my shell for nothin'. I had this high, squeaky voice and these itty-bitty little pincers. And then one day, boom! I sound like Caruso and these whoppers pop out!" He soon saw that Melody was pushing a row boat out into the ocean. "Young lady, just where do you think you're going?" He then asked, scolding her in a way that wouldn't feel different of when Ariel was a teenager.

"I've gotta figure this out," Melody said as she rowed out into the water. "This necklace means something, and if no one's gonna tell me, I'm gonna find out myself."

"We'll come with you, Melody." Estelle smiled.

"Guys?" Melody looked over to her cousins.

"You cannot do this alone," Felicity told Melody. "I may not be a strong swimmer like you guys are, but you cannot do this without us."

"That's right." Akito nodded.

Sebastian soon tried to stop them, but he didn't have a whole lot of luck.

"Alright, guys, then come on." Melody said as she knew that she could trust them.

The Fudo cousins soon joined her. Felicity felt nervous about being in the water, but soon got comfortable and joined them. The kids then returned their Pokemon into their Pokeballs for a safer journey out to the sea.

"Melody, please!" Sebastian panicked. "You're making a big mistake!"

Unfortunately for them, someone evil was watching this from a secret lair. "Oh, this is delicious... This is divine!" The being cackled evilly.

A puny shark was also watching this with her. "Let's go, flatsos!" he then told the sting rays before swimming off with them.

"Hurry, Undertow," The woman smirked. "There's a little girl out there who needs our help~"

Sebastian was seen going back to the castle while trying to calm down. "All right, Sebastian, you must remain calm," The crab told himself as he looked like he was going to have an anxiety attack. "This is not your fault. All you have to do is go in there and calmly explain... That Melody has run away. No reason to lose your head. Whatever you do, you absitively, positutely... Must not panic."

The adults soon came outside and looked around.

"Melody!" Ariel called out, and where that one voice caused Sebastian to have an anxiety attack.

"Sebastian, relax, you look worse than Cherry in Magic Class finals." Atticus told the crab.

"What're you doing here anyway-" Ariel began to ask.

"All my fault!" Sebastian cried out. "I tried to stop them! I don't deserve to live!"

"Sebastian, calm down." Mo told him.

"The children are gone?" Forte asked. "Gone where?"

"Out... Out... Out to the sea!" Sebastian soon cried and blew his nose in Ariel's dress skirt.

"What do you mean?" Ariel asked. "Where could they be going?"

The parents began to wonder that themselves.

"To Morgana's..." The tiny shark smirked to the kids in their row boat.

"And she can tell us what this locket means, and why it has my name on it?" Melody asked.

"Oh, sure, kid," Undertow chuckled. "Morgana's the best! She'll help ya."

"Um, well, okay." Estelle said.

"Then... Let's go!" Melody added.

The sting rays then tugged onto the boat and pulled it to take them to go see the one named Morgana. The kids began to have a bad feeling about this.

"Guys, I am feeling cold." Felicity said.

"You're cold-blooded." Akito and Estelle reminded her.

"No, I mean, I am nervous." Felicity said.

"Same here." Vincent replied.

Later on, they seemed to travel for a while and soon huddled in blankets as they passed through the cold fog. Melody soon woke up and looked around with a gasp as they seemed to come into an ice cave.

"An ice cave?" Estelle asked out of confusion. "This is where she lives?"

"Angel Face, meet the one and only: Morgana." Undertow introduced.

The kids looked over with Melody as a mysterious octopid woman who appeared after spinning in a clam shell chair.

"Oh, welcome, my precious," Morgana smiled warmly. "Oh, don't be shy. Come in. Come in out of the cold."

The kids soon got out of the boat.

"Sit, sit. Put your feet up," Morgana smiled as she let them sit down before offering them some snacks. "Hungry? Afraid all I have is a cold plate. Smelt-cicle? Kelp chip? Hush guppy?"

Felicity looked a bit sick to her stomach.

"Um, no thank you." Estelle declined.

The others gave polite smiles, but also declined to the offer.

"I was hoping you could tell me about this pendant, why it has my name on it," Melody said to Morgana as she held the locket. "My mother wouldn't tell me. She just doesn't understand."

"Oh, you're not the only one with a mother who doesn't understand you," Morgana cooed as she took the locket. "Believe me, I know just how you feel. Dear child, did you ever consider that it has your name on it because it has your destiny in it?" She soon opened the locket.

Melody looked curious while the cousins watched with her.

"Oh, deep down you know you weren't meant to be a lowly human," Morgana told Melody as they watched Atlantica. "What you are is something far more enchanting."

"A mermaid? But that's not possible." Melody replied.

"Darling, anything is possible." Morgana told her.

"You can turn me into a mermaid?" Melody asked.

"Piece of fish cake, honey." Morgana smiled sweetly.

"Yeah, right." Undertow muttered.

Morgana soon went to get something to help and soon found a special potion. Felicity put her feet in the water, gently splashing since she wasn't a strong swimmer like the others.

"Ah..." Morgana smiled as she found a goblet and blew the dust off, showing a very familiar old face.

"Ursula's magic?!" Undertow growled at Morgana. "Where'd you get that?!"

"I've been saving it for a special occasion," Morgana chuckled as she sat down with Melody and her cousins. "One drop of this and, bada-bing, bada-boom! You're in fin city! Whee!"

"Really?!" Melody beamed.

"Come, my darling," Morgana said as she took Melody's bare foot and lowered the potion. "Your destiny awaits you~"

Melody soon remembered how Felicity wasn't a good swimmer and had an idea. "Miss... Could Felicity be a mermaid too?" she then asked.

"Hm?" Felicity blinked and turned over.

"She doesn't really know how to swim." Melody told the woman.

"Oh, why then of course she can be a mermaid too, dear." Morgana smiled.

"Me... A Sirène...?" Felicity muttered to herself.

"Yeah!" Melody smiled.

"Oh, Melody, you do not need to..." Felicity smiled bashfully.

"Come on..." Melody told her.

Felicity then shrugged and scooted over to have some of the potion for her own feet. Morgana soon let two drops from Ursula's magic touch both of Melody's left foot and Felicity's right foot.

"Ooh... Cold..." Felicity shook a chill.

Morgana soon laughed and by the magic, the girls grew their own tail fins. They were both quite amazed by this. Morgana soon laughed out of victory.

"Okay, that laugh's kinda creepy." Estelle commented.

"I don't believe it!" Melody gushed. "I'm a mermaid!"

"You're both mermaids." Estelle smiled.

"Incredible..." Felicity whispered as she touched her tail fin and smiled brightly, the biggest smile she had ever had.

"Sing it loud, say it proud!" Morgana beamed.

Melody and Felicity then jumped into the water and they began to swim around Undertow, having the time of their lives. Akito, Estelle, and Vincent soon joined them.

"You had this all along," Undertow complained to Morgana. "You coulda changed me back. Why, I oughta-"

"Keep your scales on, small fry," Morgana smirked to him. "I'm still reeling her in."

Meanwhile, back with the parents...

"Oh, Daddy, I'm so worried." Ariel frowned as she spoke to her father in the first time in what seemed like years.

"Everything's going to be all right, Ariel," Triton soothed his youngest daughter. "We have search parties scouring the ocean. I'm going to join them now myself."

"We should join them." Atticus said.

"I think he has a point." Eric agreed.

"But, guys-" Ariel said softly.

"I need to stay here and lead the search on land, but you know these waters, and you know our daughter," Eric smiled to his wife, cradling her face in comfort. "You have to go."

"He's right." Mo said.

"It may be dangerous." Triton reminded since it had been years since Ariel was underwater.

"They're right, Daddy," Ariel replied. "I should've known I couldn't keep Melody from the sea. It's a part of her. And a part of me. I have to go."

"We're going with." Cherry said.

"Cerise...?" Forte asked.

"It's time I start being a mother to my child..." Cherry said. "She spent eight years of her life without ever knowing me... It's time she got to have some time with me."

"You're right." Forte nodded.

"Stay here with Eric..." Cherry said to him before giving him a surprise hug.

"I will." Forte replied.

"I know I don't say it a lot... But... I care about you..." Cherry whispered before letting go of him.

"Uncle Triton, if you don't mind..." Atticus said to his uncle.

Ariel looked over while hugging Eric before she would let him go.

"Here we go." Mo said.

"Bring her home." Eric told Ariel.

Ariel nodded and soon stood out in front of her father. Triton's trident soon glowed and it sent its magic around Ariel to turn her into a mermaid once again. Atticus, Mo, and Cherry soon jumped into the water.

"Come on in, Ariel, the water's fine." Atticus smiled softly.

Ariel smiled back and soon jumped into the water with them.

"I nearly forgot how great it feels to be a mermaid." Mo smiled.

"Yes... It is pretty nice..." Ariel had to admit. "Well, after a long time anyway."

"I should say so," Cherry had a small chuckle before looking grimly serious. "Now let's get the kids."

They soon went under the sea to start the search.