Fionna has left Aaa behind. It's time for her to find out what happened to her peeps.

BUT we'll save that for later. Hahaaha! (No. I'm sorry. That wasn't nice). Right now, we're going to take a look into the world without Fionna when Cake finds out she's gone.

The song in this was submitted by i love ur books. Thank you for your contribution! And if anymore of you have songs or headcannons, send them in and I'll be sure to put you're name in the chapter it's featured in and the credits at the end of the story. :)

Disclaimer: Glob! Do I wish? But sadly, it is not so.

The sun slowly crept over the hills of Aaa, basking the grassy Earth in a golden light. Pinks, oranges, and purples highlighted the clouds and the light made leftover puddles from the night previous sparkle. A calm wind bustled through the air, cooling the water and sending little ripples floating across the surface. The sky was being painted a baby blue as the morning colors faded, the sun rising higher and higher with each ticking minute.

Her big eyes opened as the sun trickled through the window pane and hit her face gently. Cake meowed and stretched her paws out in front of her, her claws poking out a little on momentum. She realized how cat-like she was acting and looked over at Fionna, hoping that the human was asleep and didn't witness her "adorable kitty-ness" as Fionna put it. Instead, her eyes met an empty bed and her ears heard nothing but ringing silence. Fionna's sleeping bag was gone and so were her pajamas. Cake blinked and jumped out of her drawer and going downstairs.

"Fi?" Cake called, searching the living room. "Are you home? Hello-ooo!" But there was no reply from the human girl. No sound of a stifled giggle behind a piece of furniture as she tried to hide and scare Cake. No running water in the bathroom to show she was taking a shower or brushing her teeth. Not even Fionna's short "yah" or "hey-yah"'s from outside that would tell the cat that the human was out practicing with swords or something.

There wasn't a trace of Fionna in sight.

Cake thought that Fionna might have gone out for an early morning dungeon battle or something so she decided to make breakfast, betting that Fionna would be back before noon. But hours ticked by and Fionna didn't return. Cake double checked the house for a note or a sign from the human to tell Cake that she wasn't going to be back for a few days or was in danger or something. The cat began to grow worried so she rushed outside, looking all around the treehouse for her sister. All she found was BMO, sitting on a pile of treasure crying little digital tears.

"BMO? Have you seen Fionna?" Cake asked breathlessly.

"Fionna is gone!" BMO wailed.

"I know. That's why I'm trying to find her."

"No. I mean that she is gone, Cake. She left the house last night. She's not going to be back for a while."

"What the grib-grab are you talking about?"

"Fionna isn't in Aaa anymore."

Cake stared at the computer for a while before running out of the treasure room and into the windy, grassy plains of Aaa. She grew a few feet and shouted Fionna's name, hoping that the human would hear her somehow. Cake shrunk down and rushed into the forest, asking anyone she came across if they had seen her. They all shook their heads or shrugged and Cake's heart felt heavy. She then proceeded to check every kingdom she could reach in time, asking the princes of the kingdoms to make a search party but they all came back negative. No Fionna. Desperate, Cake flipped open the path to the underground and asked Samson Strong but all he did was cry about how Fionna was gone. After consoling the mutant hyooman, she stretched herself out and bombarded the Ice Queen with demands, holding Ice Queen up on the wall and hissing at her for answers of Fionna's whereabouts. But the woman formerly known as Simone shook her head, not sure of where the human girl went off to.

For the entire day, Cake traveled all around Aa in search of Fionna. She went to Lumpy Space, the Underworld, you name it. She had been there. But Cake saved the best for last. She trudged over to the Candy Kingdom, out of breath and tearful, to ask King Gumball if he had seen Fionna before her disappearance. The cat was led up to the top of the castle by Peppermint Maid and was allowed entry by Gumball, who was baking a cake in his lab. He looked up at Cake through his lab goggles and smiled serenely at her.

"Hello, Cake. Where's Fionna?" Gumball asked, taking the cake out of the oven.

"That's what I was hoping you would be able to answer me," Cake said.

"What?"

"Fionna's missing."

The cake slipped from Gumball's grasp and landed with a splat! on the candy floor. He ripped off his goggles and stared wide-eyed at her.

"When?" he said.

"This morning... or sometime last night according to BMO," Cake said, slumping against the wall and sliding down to squat on the floor. "She's gone." She buried her muzzle into her paws. "I've looked everywhere. Literally. I'm not even exaggerating."

"Who's going to protect Aaa now?" Gumball said quietly. Cake's head snapped up and she gaped at the Candy King. He noticed her glare and looked at her with a confused expression. "What?"

The feline lunged towards him, her arms pinning him to the wall, her face into his. "Your friend is missing and all you care about is who will protect every prince in the land and who will go on little missions for you? Gumball, Fionna is gone. She dropped off the face of the planet and we need to find her. What if she's in danger? What if she's dead? So don't concern yourself with what's going to happen to the world around us just because Fionna's not here to be your knight in blue armor!"

His pink eyes were wide and fearful as she stared at him, her teeth grinding together in anger. Gumball gulped and quietly suggested they visit Marshall Lee. If Fionna left at night, he reasoned as they made their way over to the cave, perhaps he had seen her before she ran off. Instead of knocking, Cake broke down the door with a giant hand and stormed inside, not waiting for any pauses in her desperate search for Fionna. Marshall was lying on his back, floating in the air, strumming his guitar. He didn't even open his eyes to scare Cake. He was waiting for her and Gumball to show up. He knew that they were going to be in a big panic about where Fionna had run off to so he didn't think sleeping was such a good idea when he would be interrupted later that day.

"Where's Fionna?" Cake said acidly, not meaning to sound so angry. She was scared and worried, not angry. But Gumball's earlier comment did steam her a little. Marshall opened one eye and glanced over at her, not moving from his spot.

"Gone," he said simply.

"Gone where?" Gumball asked, stepping over the broken door pieces.

Marshall smirked. "The idiot went towards the Aaa border. She's heading towards the big crater, no doubt." He sighed and plucked a few notes on his guitar. "She's long gone by now. You'll never be able to find her. Not that she'll want you to."

"And why not?" Cake said, putting her paws on her hips.

"Because this is something she needs to do alone," Marshall said. "She left alone because she wanted to be alone. It's her chivalry or whatever. She can't let others get hurt."

"So you just let her go?" Gumball said, his eyebrows furrowing.

"I couldn't stop her if I tried. Besides, over time, you learn to let her learn from her mistakes," Marshall said with a shrug.

"By dying?" Cake said.

"Nope. Fionna needs this. A quest that will stand the test of time. I don't think you realize that she's no longer a fourteen year old girl we have to watch 24/7," the vampire said. "She's seventeen, almost eighteen. Practically an adult already. Fionna is the greatest Adventurer in Aaa and, even though I think she's a moron for going on this mission, she's not going to rest until she finds out the truth of her people."

The two others stared at him. Marshall's mischievous demeanor was gone and he seemed very down to Earth. Still, there was an off-ness about him. He was lying about something behind all of his words. There was something missing that he wasn't going to tell them anytime soon. A heaviness that only Fionna could lift was inside Marshall Lee's once beating heart and it felt like lead as he dwelled upon her. This was how he felt when Simone left him. Empty...

"Look," he said. "If you find her, you won't win the fight about bringing her home. Fionna's going to keep on going until she finds out the truth."

"Or dies trying," Cake said softly, her lip quivering.

Marshall nodded darkly, his hair falling in front of his eyes.

"Thank you, Marshall," Gumball said for Cake as he tenderly picked up the crying cat out of the house. "We'll keep in touch, yes?"

"Sure. Whatever," Marshal mumbled, his fingers dancing over the strings of his guitar. He waited until the scent of fur and gum left the area until he plugged in his guitar, not bothering with the door just yet. He had a rap in his heart that he needed to let out and this was the perfect time to do it. With a grimace on his face, his fangs flashing dangerously, he put down his guitar and played a beat on his recorder, his demon eyes glowing in concentration.

The fear in your eyes scares me

So please stay with me a while

Tomorrow you will be mine

You light up my life with your smile

You can stay with me as long as you need

Baby this battle wa never meant for you

So don't give into blood lust and greed

I know that you will be just fine.

So come home, baby, soon.

I love you and I want you to be forever mine.

He paused the beat and hummed to himself, still feeling incomplete. He looked out the window to the mouth of the cave, his mind heavy with thoughts. With a great sigh, he picked up the pieces to his door and put them in a pile to fix later. He grabbed Schwabl and floated upstairs for a nap, trying to clear his head.

Miles and miles and miles away, she had stopped, leaning against a lone tree, the hot sun beating down on the back of her neck. Grass was becoming sparse so that meant she was getting closer to the Aaa limit. No one lived out in these parts so she didn't have to worry about running into anyone she knew. Which was good since they would tell Cake how far she had gotten.

Fionna heaved a sigh and stood straight, slinging her pack onto her back before padding off again. She had been running all night and day and still wasn't out of Aaa yet. This was getting her nowhere so far. The border was a long way away so she knew that it was going to take a while until it basically became a wasteland of dirt and dust. Her shoes, that were usually shiny, were now scuffed up and dirty. Her blond bangs were slightly windswept and a tad tangled. Her shirt held bits of dust in the fabric and her socks were slowly becoming off-white. She felt gross walking like this but had to keep going, telling herself to change when necessary. Like, if her shirt was to get great amounts of blood on it or something that extreme. That would be a cue to change her clothes.

The sun began to set behind the distant mountains and the air got cooler. Grass showed in patches as she continued to walk on, her hands clutching her pack straps. Her blue eyes fixed on the horizon, getting heavy since she hadn't slept in over twenty-four hours. Stifling a yawn, she kept going, telling herself that she had to find a good place to rest. Another thought went through her head, making a note to travel at night more often since she would be in a desert-like area for most of her journey. Fionna didn't care much for getting burned to a crisp so she would have to find daytime shelter and move on at night. The sun finally set and found a crumbling, brick wall was a few feet away and Fionna moved towards it. It was the perfect place to set up camp.

She gathered a few lone branches and built a fire near the middle of what appeared to be three walls, not just one. It was as if it were a little shed. The light burned bright, smoke flowing into the night air, the soothing scent of burning wood tickling Fionna's nose. She changed into her pajamas and took out her sleeping bag. She laid it out a little ways away from the flames and rested her back on it. She looked up into the sky and watched the stars in the heavens above. A few shooting stars flew by and she silently made a wish that her friends were okay... that she would find the truth. Fionna snuck her hands into her pack and took out the sack of little people. She knew that Cake told her to get rid of them but she didn't have the heart.

She pulled out the little Fionna, little Cake, little Gumball and little Marshall Lee and watched them interact, the flames casting their shadows on the wall behind her, making it appear as if they were as big as they were in real life. Fionna sadly viewed as her little self played with little Cake, pulling out a tiny sword and pretending to fight. Little Gumball and Marshall Lee were arguing and Fionna chuckled a little. She then pushed little Marshall over to little Fionna with her finger and the two of them blushed at one another as Fionna egged them on. With a soft smile, she watched as little Marshall took little Fionna's hands and they danced by the light of the fire. Fionna turned her head to look at the shadows and felt a tear slide down her face as it gave the appearance of Fionna and Marshall Lee were really dancing right before her eyes. After a while, she took back the little people and put them in the bag. She wriggled into her sleeping bag and closed her eyes, missing her friends with all of her heart.

The following morning, Fionna didn't leave camp. She planned on staying there until dusk so she could go off again without getting hot. Fionna changed into her clothes from yesterday and leaned against the brick wall, chewing on some bread she snatched from her Tree Fort before leaving. She was watching little Fionna and Cake run around the ground together as entertainment. Fionna ripped off a little piece of bread and handed it to her little self. Little Fionna grabbed it with wonder and split it with Cake. The bigger Fionna smiled as she thought of how she used spend time with Cake in the mornings all the time, eating bread or eggs or bacon or whatever they fixed up. Fionna then picked up the little people and put them into the sack. She took out the pieces of The Enchiridion and read them over, looking at some of the information it had, seeing if anything useful on the pages. After reading, she stuffed them back inside her pack and continued to eat her bread.

Sooner than she expected, night fell. Fionna packed up her stuff and walked away from the broken hut. She found herself facing a sign that was poorly made and written on. On that sign "Now Leaving The Land of Aaa" was scribbled. Whoever made the effort to put this out here told Fionna that she was about to leave what she knew as home forever. With another heavy sigh, she pressed on and her feet hit cold, hard dirt. She was no longer in Aaa. She was far from it. Fionna kept wandering forward, checking her map every once in a while, to see if she was heading the right way.

To her surprise, she found herself in a decaying city around midnight. She paused her journey and decided to search around the shops. She looked at some old diners, toy stores, and clothing stores. Everything was old and looked really outdated so Fionna couldn't take any of the clothes or food. Fionna kept walking around and looking at the places around her. No doubt in her mind, this decay was caused by the Mushroom War. One building that was still standing firm, not counting parts of the roof that caved in or the walls slightly falling apart, and had faded letters that read "Library".

"Hm?" Fionna said with a shrug, walking up the steps into the building. Perhaps there were some things about the war in some of the books. It was unlikely but what did she have to lose?

She pushed open the aging door and walked inside, her shoes making echoing clicking noises against the hallowed halls of the world of knowledge. She stopped by a shelf and took out a few books, skimming through a few pages and finding nothing that peeked her interest. So she continued to stroll around the library, stopping every so often to look at a book or two and then move on. Fionna came upon a desk that was in the middle of the library with an old computer that didn't work, a few stacked books, many pieces of crumpled paper, and other papers that had been written on with a pencil. Fionna moved closer to it and noticed how the writing looked. It appeared to be recently written. She picked up the notes and read it to herself.

It's been four days since I arrived to this place. Still no sign of civilization or life in general. I am hoping that I will come across the very thing I've been searching for... it's good that I found this town. Hopefully the library will provide some information.

She paused for she had heard footsteps behind her. She dropped the note and turned around, drawing her sword out of its sheath, looking for the thing that made the footsteps. Fionna moved forward, the chipped sword slightly glowing in the dark, her blue eyes moving around the room. The footsteps sounded again from behind and she spun to her left, pointing her sword at the... enemy?

What stood before her made her mouth fall open slightly. The supposed enemy had brown hair, green eyes hidden behind chipped and cracked square glasses, a light brown collared shirt, torn jeans, and was standing a few inches taller than her. She looked closer and saw peach colored skin. The only time she had seen skin of that color was when she looked into the mirror. Her heart leapt in her throat as she realized that this enemy... was just like her.

A human.