"Hello, Gravity Falls! Your favorite duck has arrived!" cried Dewey Duck.

Dewey's brothers and Webby followed behind him.

"Do you really have to kick down the door when you do that?"

"Huey, if I didn't I'd be lame."

"Well, you don't see me damaging people's property!"

"Case in point, Huey."

"Ah, the Mystery Shack... a conman's dream!" said Louie. "There better be some good stuff around here."

"Hey, guys! Welcome to the Shack!" called Wendy.

"You guys are here! Yay!" called Mabel. "Wait, where is-?"

Mabel then saw a certain duck behind the brothers and grew a large excited smile.

"Webby!" Mabel called.

"Mabel! Hello!" called Webby back, giving Mabel a hi-five. "Grappling hook buddies?"

"Yeah! Grappling hook buddies!" Mabel said pulling out her grappling hook.

"Well, you two seem to get along really well," commented Dewey.

"What can I say?" asked Mabel. "We connect really well! Like peanut butter and jelly!"

"Yeah! I can see that! You guys are both energetic and... well... you're both energetic," said Dewey.

"And we're both about adventuring too!" said Webby.

"We've been alike ever since we first met!"

"Oh! Hi there! I'm Mabel!" said Mabel.

"Hi! I'm Webby! What you got there?"

"A grappling hook!" said Mabel.

"Oh cool! Me too!" said Webby.

...

"You wanna be friends?" asked Webby.

"YEAH!"

"Off we go, then! Race you!" said Webby, taking off to the sky.

"Hey, wait up!" said Mabel, following her.

"When our grappling hooks combined, that was the sign we were meant for each other," said Webby.

"We might as well be twins!" said Mabel. "We both think glitter is awesome..."

"We both really like adventuring!"

"We're both into cute and adorable animals!"

"We're both not afraid to look into the eyes of danger!"

"And best of all..."

"We're grappling hook buddies!" they both finished.

Just then, another familiar duck entered through the door.

"I cannae believe you convinced me to come here, Webby..."

"Mr. McDuck!" said Mabel. "Hello! Soos! Come here!"

"Oh, Mr. McDuck!" said Soos. "Welcome to the Mystery Shack!"

"You can get me out of here..." said Scrooge.

"Oh come on, Uncle Scrooge," said Huey. "I know this isn't the most honest place in the world, but it's still kind of important."

"This is a place full of lies," he said. "Listen, Soos. I'm sure you're a nice guy with good heart and all, but I cannae support a place like this. I became the richest duck in the world by being tougher than the toughies-"

"Smarter than the smarties, and sharper than the sharpies," interrupted Wendy. "We've all heard of it before."

"Not by showing people things like... half monkey, half fish hybrids?" said Scrooge, staring at one of the "artifacts". "How about actual things from the forest? I know about all the adventures the kids went and they would make for better things than-"

"That may be true," said Soos, importantly.

"Why does insist on interrupting me?" said Scrooge.

"But think of it like this... the artifacts may be fake, but people's dreams are not. When people come to this shack, they look at these artifacts, and gives them a sense of hope. It inspires them to be curious. It offers entertainment!"

"And this is supposed to change the fact that this is a place run by dishonest props how?" said Scrooge, doubtfully.

"Yeah, I keep forgetting your Grunkle Stan doesn't run the place anymore," said Webby. "Now that he's off on exciting adventures and all."

"I'm still getting used to not having him around," laughed Soos. "I keep expecting someone to tell me to fix the cart, fix the sinks, and do basically everything against my will with no payment."

"Oooh boy..." said Scrooge.

"Here, how 'bout I tell you about some of the adventures we went through," said Soos, taking Scrooge away.

"Maybe it's for the better..." said Huey. "'I still have traumatic memories of when Grunkle Stan was here..."

"And here we have our latest capture, the rare and elusive humanoid Duck children!" said Grunkle Stan.

"HELP! I CAN'T BREATHE!" cried Huey.

"LET US OUT OF HERE!" cried Webby.

"THIS MAN IS INSANE!" cried Dewey.

"I HAVE TO USE THE BATHROOM!" cried Louie.

"Aw, they're so adorably hostile... aren't they?"

"Awww!" went the crowd, taking pictures.

"Hey! It's 10 bucks per photo folks!"

"It was so cold in there..." said Huey.

"Oh come on," said Webby, trying to keep a smile. "That was just... wacky shenanigans..."

"Wait... I don't remember that..." said Mabel. "When did that happen?"

...

"I'm just gonna go inspect some of the stuff here... yeah," said Huey, walking off.

"I'm coming with," said Louie. "This place is a conman's dream!"

"Boring!" said Dewey. "Why don't we go outside and find ourselves a mystery to solve? Where's Dipper, huh?"

"He's out with some friends," said Mabel. "Said something about wanting to cheer Craig up in the Creek I think."

"Oh, okay," said Dewey, coolly.

"He took the book with him," added Mabel.

"Aw... why?"

"Probably so someone like you wouldn't get into trouble with it," said Webby.

"...okay, that's somewhat fair, but what are we supposed to do cooped up in this shack?"

Mabel then turned to Webby excitedly.

"You thinking what I'm thinking?"

"Ooooh! Yes!" said Webby.

"We... host a webseries!"

"Learn about the history of Gravity Falls and what lies in this mysterious...!"

Webby looked at Mabel awkwardly.

"Uh, you sure you guys have everything in common?" asked Dewey, pretending to inspect the two. "Cause I'm spotting a few difference here..."

Webby and Mabel began blabbering.

"What! Oh no! See, what I meant to say was-"

"We were just, uh-"

"Well, I mean we could-"

Before any more interruptions could be made, Waddles, Mabel's pet pig, came into the scene.

"Waddles!" called Mabel. "Waddles, you know Webby, right?"

"Aww! He's so adorable!" said Webby.

The two shared a hug with a pig.

"Well, you two can do what you want," said Dewey, looking around. "I'm gonna seek adventure!"

Huey was busy observing the Shack.

"Wow... this is so awful," he said.

Just then, Huey felt a tap on his shoulder. Huey turned to see a little kid looking at him curiously.

"Excuse me... what are you supposed to be?

"Oh," said Huey awkwardly. "I'm a duck, obviously."

"I don't think he is..." said another child. "I think he's supposed to be a goose."

"Excuse me, what?" asked Huey, offended.

"See? He's all white and he's got a beak and everything."

"Uh, ducks have beaks to you know. And no, I am not a goose. I am clearly a duck! It's in my name! Huey Duck!"

"Now that you mentioned it... he does look like a goose a little," said the first kid.

"You're costume's funny," said a third approaching child.

"I'm not wearing a costume! I am a genuine living duck!"

"If you're a duck, do you eat bread?" asked the first child.

Now, Huey was starting to get annoyed. And if you know anything about Huey, he has quite a temper.

"Uh, we eat just about anything, like you guys. I mean, it's kind of rude to-"

"Then, you're not a duck are you? Ducks only eat bread," the second child.

"Excuse me!?"

"He must be goose! He honks like one!"

"I AM NOT A GOOSE! Stop saying that!"

"What kind of bird is he?" came yet another child. "He looks funny."

"I have some bread if you'd like some," came yet another child.

"I'm not an animal, dude!"

"So, are you not a duck then?" said the fifth kid.

"No, I mean- I'm-" Huey growled. "THAT DOES IT! I refuse to be treated like this! Someone needs to lecture you people about my species! I'll prove it to you that I am indeed a duck!"

And he stormed off to prepare a lecture.

"I still think he's a goose."

"Ay, these kids..." said Scrooge. "It's like they've never seen a duck before."

"Like, has no one here watched Ducktective before?" asked Soos. "He's the greatest duck to hit television."

Scrooge was puzzled.

"I'm afraid to ask this, but... what is 'Ducktective'?"

"You mean, you've never heard of Ducktective? Oh, it's only the greatest crime show to ever exist!"

"Uh... what?"

"Hey! Why don't I show you a few episodes of it! We could be binge-watching buddies!"

"I just asked what it was! I didn't ask for- !"

"Oh, come on! You'll love it! It's about a duck that solves mysteries!"

"...Eh. It beats anything here."

"Great!" shouted Soos. "Let's go!"

Soos grabbed Scrooge and ran to the TV.

"Wendy," called Soos. "We have a drama emergency. You're in charge until I get back!"

Soos threw the fez on Wendy's head. Wendy looked up puzzled.

"I'll take that off your head!" said Louie.

...

"It's all yours," said Wendy.

"Ah, thank you," said Louie. "Time to show Soos how a duck runs the Shack!"

Louie cleared his throat.

"Hey, everyone! It's tour time!"

"Alright, Webby!" said Mabel. "Hurry up and get Waddles over here!"

"What are we doing now? And why do you have a camera?" asked Webby.

Mabel then pulled out a poster from beneath her bed.

"You wanna help me out on a web-series of mine?"

"Ooh! A history series?"

"Eh... not really," said Mabel.

"Oh... then, is it about documenting new discoveries of creatures in Gravity Falls?"

"No, that's actually Dipper's little nerd series that he likes to do," said Mabel.

"Ooh! You're brother as a series too? And it's for nerds?!" asked Webby eagerly. "Can I see?"

"Uh, maybe later..." said Mabel. "Don't you want to see my series is all about?"

"Oh, of course," said Webby, regaining composure. "Sorry, just got a little excited there."

"My series is all about teaching people how to do just about anything... the Mabel way!" said Mabel, turning on the camera.

"Heyo, fans! And welcome back to Mabel's guide to Everything!"

"Yaaaay!"

"Thank you, thank you," said Mabel. "Today, we're going to be talking about a topic that I wasn't exactly planning on doing, but was a special request from a very special friend. Please welcome from Duckburg, Webby Vanderquack!"

"Hi, audience!"

"So, Webby, what is it you would like to talk about?"

"History!"

"I can work with that!" said Mabel. "Mabel knows all about history!... Such as the evolution of cat videos!"

"Uh... I was more thinking about the history of Gravity Falls... more specifcally on the very founder of Gravity Falls, Quentin Trembley, the eighth-and-a-half president."

"Yeah, I remember when Dipper and I first met him. He even made me an official congressman of Gravity Falls!" said Mabel.

"I'm always a sucker for the origins of towns, especially ones that are as mysterious as Gravity Falls! Aren't you?"

"Uh..." said Mabel, trying not to sound indifferent on the matter. "Yeah! Of course!"

"I've been doing a lot of extra research in my spare time, and no one has ever been able to uncover the full story of this man! I know this guy is completely nuts and isn't the most practical, but that's why I'm so fascinated in the history of this guy. The more I look into your founder, the more weird things I discover about him! The origin of this town is so wild, kept away from the public, and I wanna show you every single detail I've managed to find about your very own town! You might even learn some thing you didn't even know yourself!"

Webby pulled out a large diagram showing many top secrets facts about Gravity Falls. How she managed to learn so much about a town outside of Duckburg is beyond me, but hey... that's Webby for you.

"Where did you have time to do all this?" asked Mabel.

"...I have a lot of spare time between adventures," said Webby. "Now, let's begin with..."

One hour of Webby explaining all of her findings later...

"And that is the real reason for why Washington chased Trembley with a paddle! Washington really was onto Trembley! Don't you think, Mabel?"

Mabel been asleep the whole time and the camera had run out of batteries by then.

"Mabel, are you paying attention?"

"Huh- wha-" said Mabel, waking up. "Oh, yeah! That was great! Totally was awake through the whole thing... say, what's with the question mark there?"

"Well, there's just one small issue I have... one last piece of lost Trembley property... the chest."

"The what?"

"According to your founder, when Trembley feared that he was being targeted on by supposedly evil bush dwellers, whatever those might be, he took his most prized possession, put it in a chest, and buried it somewhere where he could remember it... he then forgot where it was within a minute..."

"And what was in it?... And why didn't he tell me about any of this. I'm his official here!"

"...that's just it," said Webby. "I don't know what was in it... he never said. Trembley might have been crazy, but he was pretty good at keeping secrets... that or he just forgot them the next second to focus on babies or something... but one thing he did say was that it was nothing like anything he found in Gravity Falls. Fortunately, he did write a map for it... but then he lost that within a minute too while he was chasing a squirrel. If I only knew where the map was, I would have found it by now..."

"Why do you want to know what's in it so badly?" asked Mabel.

"Because, knowing your founder, anything could be in it. If the guy who was kept a secret was so wild, just imagine what a secret kept by that very secret would be like! It could be a new hybrid of animals that he wanted to try out for fun. It could be a magical power source for all of Gravity Falls. It could be an explosive to obliterate all pancakes in the world!"

"He did say he really hates pancakes..."

Webby sighed.

"But as long as that map is missing, we'll never know for sure."

Just then, Dewey burst through the door.

"You'll never guess what I found!"