Starlight Glimmer was at the lake all alone, feeling bored, while reading a book titled "Fluttershy in Wonderland". She flipped through pages, skipping the first nine pages. "No wonder why this book is very fascinating involving Fluttershy." Starlight Glimmer said with a happy smile.

"This story is where Fluttershy becomes big and small as she visits Wonderland, right?" Starlight Glimmer wondered, only knowing about growth and shrinking spells from random occasions.

Starlight Glimmer saw a page depicting Fluttershy shrinking and later, a page where she was growing. "I'm starting to like this book!" Starlight Glimmer said with joy, feeling excited about the book.

"And Fluttershy finds the rabbit." Starlight Glimmer said, seeing Fluttershy with a bunny that looks just like Angel Bunny.

"I suppose I've read about enough." Starlight Glimmer said, feeling tired, as she levitated the book on her hoof.

"If I could find something that has to do with growing and shrinking, I guess that'll work out fine." Starlight Glimmer said to herself, feeling a bit interested about what she read recently from the book.

Starlight Glimmer has finally reached the Castle of Friendship, and she was wondering to herself, "Is anypony in this castle?" was no answer, but Starlight Glimmer opened the door with her magic and decided to go in the castle anyway.

Inside the library, Starlight Glimmer realized that nobody was in the castle except for herself. However, she then saw a bottle on the table couple inches behind her. "What does it say on the bottle?" Starlight Glimmer asked as she felt curious what the bottle could do, as it can have an effect on her.

Starlight Glimmer levitated the bottle and noticed the bottle had the words "DRINK ME" written on a paper attached to the bottle. "Drink me?" Starlight Glimmer questioned herself.

"I guess it wouldn't be a bad idea for me if I drink this…" Starlight Glimmer said to herself, drinking the bottle until it was almost empty.

As a result, Starlight Glimmer started shrinking, being unable to hold onto the bottle any longer. "Oh, no! I'm small!" Starlight Glimmer said in shock, realizing she was not the same size as she was anymore.

"How am I gonna reach the bottle now?" Starlight Glimmer wondered, as she needed to find a way on how she can reach the bottle while being too small to grab it.

Starlight Glimmer tried jumping several tries so that she could reach the bottle, but nothing worked. " Oh, I'll never get the bottle at the size I'm at now!" Starlight Glimmer worried to herself.

"If only Twilight Sparkle was inside this castle right now, she'd probably know how to solve this by now." Starlight Glimmer said in her head, sitting near the table, looking upset that she almost drunk everything out of the bottle.

"I gotta try another way as in an attempt to reaching that bottle." Starlight Glimmer suggested.

Starlight Glimmer eventually tried to climb up the table, but that didn't work either. She tried even more ways, which also didn't work. "Seems that I will not reach the bottle like this…" Starlight Glimmer said with disappointment, after several tries reaching the bottle at a very small size ended up unsuccessful.

"Perhaps something in this library should have something besides that bottle." Starlight Glimmer said, as she levitated a box filled with cookies near her.

"I'm definitely not gonna be stuck in this library all day!" Starlight Glimmer complained to herself before she opened the box, which the cookies read "EAT ME".

"These cookies look so tasty. Maybe I should try one." Starlight Glimmer said with thrill, levitating one of the cookies on her hoof, and then ate it.

Unexpectedly, Starlight Glimmer began to grow until her head hit the ceiling. "Ow!" Starlight Glimmer said in pain, unaware what just happened. "I feel like this has been going way out of control."

Starlight Glimmer, noticing that the box wasn't with her, and looked down, wondering, "What happened to the box? Wasn't it just with me seconds ago?"

Outside, Twilight Sparkle was walking towards the castle, and knocked on the door, looking for answers. "Anyone home?" Twilight Sparkle asked, waiting for another answer, but the answer was not given.

"What's going on?" Twilight Sparkle asked herself, feeling like the castle is being haunted. She tried levitating the door with her magic, but it did not open. "How come the door's not opening?!" She asked with confusion. "When I open the door, it always let me in. How is it not letting me in?"

Twilight Sparkle, annoyed, teleported herself inside the library, and then Starlight Glimmer, who was gigantic, reacted to her appearance in shock. "Starlight, what's going on? And why are you so gigantic?" She asked Starlight Glimmer.

"You see, it has been something myself figuring this out as well." Starlight Glimmer told Twilight Sparkle, telling her about what happened. "I found a bottle that made me shrink, and then, I ate some "EAT ME" cookies that made so large, my head hit the ceiling."

"Whatever you do, stay still." Twilight Sparkle warned Starlight Glimmer, fearing that things could even more worse. "But I am sitting for the most part." Starlight Glimmer told her.

Twilight Sparkle walked towards the table and saw the bottle Starlight Glimmer was drinking earlier, in which only a little was left in the bottle. "Did you drink this?" She asked Starlight Glimmer. "Yes, I did." Starlight Glimmer answered. "There's not that much left in the bottle, and if I don't shrink, then I'm gonna end up like this forever!" She said in fear.

"Don't worry, I'll handle the bottle towards you so that you can feel like your regular self again." Twilight Sparkle told Starlight Glimmer, levitating the bottle towards her, allowing her to drink the rest of it.

Starlight Glimmer began drinking the rest of the bottle, and started shrinking again until she was a regular-sized pony again. "Phew! I'm like myself again!" She said with joy.

"Well, things should be back to normal." Twilight Sparkle said, feeling that things are just regular like they always have been. "Let's go get some donuts!" She told Starlight Glimmer, as she was starving for some donuts at the donut shop. "Alright!" Starlight Glimmer replied back, following Twilight Sparkle as they went outside for some donuts at the donut shop.