Sweetie Belle, Scootaloo and Applebloom lay on the sandy floor of the grotto. "What should we do? We can't keep it a secret for long!" Sweetie creid. Applebloom flopped on her stomach and propped her head on her hooves. "Ah' don't know. Maybe it'll fade after a bit." She shrugged. Scootaloo sat on a rock and leaned down to trace in the sand with a stick. Sweetie Belle peered down. "What are all those scribbles for?" She asked. The other merfilly glared at her. "They're not scribbles! They're a plan! Pip noticed that Rainbow Dash goes for an afternoon picnic with her friends today, so at that time, Applebloom splashes the water, I come out of it, and you-" Sweetie Belle stopped her. "I'm not doing anything to help that! The pony world, it's a mess! This is your home!" She suddenly started to sing in her beautiful voice.
"The seaweed is always greener, on somepony else's lake. You dream about going up there, but that is a big mistake!" The merfilly giggled and grabbed two flowers and put on in Scootaloo's mane and the other behind her own ear. They joined hooves and Sweetie Belle showed her friend the sea world. "Just look at the world around you! What more are you looking for?"
They spun in circles as fish surrounded them. "Under the sea! Under the sea!" She sang, putting a hoof around Scootaloo. "Darling, it's better, down where it's wetter, take it from me!" The filly creid. "Up on the shore they work all day, out in the sun they slave away! While love we are bringing and we are singing, under the sea!" Then all the sea creatures joined her. "Down here all the fish are happy! As off through the waves they roll!" Twist sang with Sweetie Belle. "The fish on the land ain't happy! They're sad cause' they in the bowl. But the fish in is lucky!" Sweetie Belle sighed. "They're in for a worser fate!" She whispered. "Cause' when the boss gets hungry," She added. "They ended up on somepony's plate!" The creatures called.
"Under the sea! Under the sea!" They sang together. "Nopony to stop us, simply because we're under the sea! Up there, the ponies like to cook, under the sea, we're off the hook!" The white unicorn giggled. "We have no troubles, life is the bubbles, under the sea!" She cried. "Under the sea! Since life is sweet here, we got the beat here naturally!" Sweetie Belle sang. "Even the jellyfish and other things, they like me, all like to sing!" She swam to a rock and performed. We got the spirit, you got to hear it! Under the sea!" She and Scootaloo hugged. The newt play the carp play the harp. The plaice play the bass. And they soundin' sharp. The bass play the brass. The chub play the tub. The fluke is the duke of soul!" Sweetie Belle cried, pointing to each. "The ray, he can play. The lings on the strings. The trout rockin' out. And of course, I sing. The smelt and the sprat, they know where it's at. And oh that blowfish,"
"Blow!" The group chorused.
"Under the sea! Under the sea! They have ways to pout, we sing our hearts out, that's music to me! What have they got? A lot of sand. Meanwhile, here we got a huge band! Each little clam here, knows how to jam here, under the sea! Each little slug here, they're cutting rug here, under the sea! Each little snail here, knows how to wail here, that's why it's hotter, under the water!" The merfilly sang. "Yes, we're in luck here, down in the muck here, under the sea!" The creatures finished with Sweetie Belle in the center on a rock. She bowed, but to a non existent audience. Scootaloo and Applebloom had swam off. "Oh, come on!" The girl yelled. "I found you!" A little seahorse cried, swimming up to her. "Oh… Hey, what's up?"
"It's the Queen, she wants to see you." Sweetie Belle gulped.
"H-hey Queen Luna, how are you?" Sweetie squeaked nervously. The Queen walked down. "I've seen something odd in my daughter's dreams lately." She said. The merfilly gulped. "I… Oh! I told her! I truly did tell her she can't idolize that silly pony but di-" Her blurting was interrupted. The Queen suddenly boomed. "Pony?! A regular pony?!" Sweetie Belle giggled nervously. "Maybe…"
"Applebloom, can you just tell me what this is about already?" Scootaloo laughed as her friend pulled her to the grotto. "Al'right, close your eyes." Applebloom whispered. The princess did once they reached the cave, the other merfilly cried out, "Surprise!" Scootaloo fluttered open her eyes and gasped. There was the statue of Rainbow Dash from the ship. "Oh Applebloom! You're amazing!" She squeed, giving her a hug. Then she swam up to the fake idol. "Oh Rainbow Dash! Me? Be your little sis? Well, su-" She suddenly stumbled into a dark figure. "Mother…" She gasped. "Did you really rescue a pony from drowning?" Luna asked. Scootaloo bit her lip. "I had to! She would have died-"
"At least it would be one less to worry about!" Luna yelled. The princess gritted her teeth. "I like her! I want to be just like her!" She cried. "But she's a pony, you're a merfilly!" The Queen growled. Suddenly she started firing her horn at her daughter's artifacts. "No! Stop! Stop it! No, no, no!" The merfilly screamed through tears as her things were destroyed. Finally, the statue was blown to pieces. The girl collapsed to the floor and sobbed. Luna hung her head in shame and left.
Sweetie Belle swam in. "Um… Scootaloo-" She was interrupted. "Just go away." Scootaloo growled. The merfilly was going to say something, but stopped and swam away. At that moment, the two sirens entered. They came to the princess who was still crying. "Poor child," Aria whispered. "Poor, sweet child," Sonata cooed. Scootaloo sniffed and looked up at them. "What a poor little girl with such a big problem…" Aria sighed. "Yeah, I mean that must of hurt. Wish we could help." Sonata shrugged. She was about to swim away when Aria grabbed her. "We can!" She growled. The other siren stopped. "We can?" She asked. Scootaloo suddenly whispered in a shaky voice, "W-who are you?" Aria smiled, very sinisterly. "Don't be afraid, little filly, our leader can help you, make your dreams come true." Sonata continued. "Just imagine it, you and Rainbow Dash, sisters forever." Scootaloo wiped away her tears. "Huh?" She whispered. "Adagio has amazing powers…" Aria said. The princess's eyes wided. "That siren?! No… I can't! Just no! Get out of here! Leave me alone!" She cried. The sirens started to swim away. "Wow, what a chicken!" Sonata laughed. The filly gave a growl. "What did you say?!" The mares turned. "Well you can't be as perfect for Rainbow as you think if you're such a… Chicken." The princess swam up it rage. "I'm not a chicken!" She yelled. The sirens snickered. "Well-" Aria started to say. "Take me to her." Scootaloo snapped. The mare smirked.
Applebloom and Sweetie Belle sat outside the grotto. "I didn't mean to!" Sweetie sobbed, brushing away tears. The other nodded. At that moment, Scootaloo swam past them. "W-where ya' goin'?" Applebloom asked. Sweetie Belle noticed the sirens. "And with them?" She whispered. Scootaloo glared down at her. "I'm seeing Adagio." She replied. The other gasped in horror. "What?!" The princess swam away before she could continue. "No! She a monster! Y-you're making a huge mistake!" She screamed. Applebloom looked concerned after the princess. "What should we do?" She gasped. "Help her! What else?!" Sweetie Belle cried, swimming after them with Applebloom following.
Scootaloo swam into the siren's cave. She peeked at Adagio. "Oh, I know you're there! Come in, sweet child." Said the leader. The princess blushed and swam up. "Er… Hello." She whispered. "No time for greetings, my dear! You have a problem. This… Rainbow Dash of yours, you want to be like a little sister to her. Well, I must say, it's not going to happen. Let's face it, she's a pony, you're a half-fish." Adagio sighed. Scootaloo narrowed her eyes. "Then why did they bring me here?!" She cried. "Oh hush! You need to quiet down that strong little voice, songbird. The only way you might be able to get your dream is to become a pony yourself."
"You can do that?" Scootaloo asked. "My dear, sweet child, that's what I live for!" Adagio laughed.