Dipper is examining a poster board on his wall entitled "Who is The Author?"

"Alright author, who are you? Who are you?..." Dipper chews on a pen, which accidentally breaks, "Blech! Not again." He tosses it into a bin full of broken pens.

Mabel, runs in with a bottle, "Hey, bro-bro, Will. Look what I got!"

Dipper, sarcastically, "Yay, a filthy green bottle!"

"It's a bottle message from Mermando, remember? He was part fish, part shirtless guy." Mabel gasps, "What if he wants to get back together?"

Will frowned, looking down.

Dipper sighed, "I wouldn't get your hopes up, Mabel."

"Too late! Hopes are way way up!" Mabel squeals excitedly, opens bottle cap and reads letter, " "Dear Mabel..." So far so good! "It is with a heavy heart..." So far so good! "...that I must inform you, I'm getting married"?!"

Dipper sighed, "And there it is."

Mabel, reading, " "In order to prevent an undersea civil war... arranged wedding... Queen of the Manatees?!" She looks at picture, "And she's so beautiful!" She sighs, "This can't be happening!"

"Oh, Mabel. You'll get over him eventually," Dipper grumbled.

"You don't understand, Dipper." She pulls out her scrapbook, "On my first day here, I made this page for summer romances. Look at my luck." She points to a picture of Norman, lTurned out to be gnomes," She points to a picture of Gideon, "child psycho," She points to a picture of Gabe Bensen, "made out with his own hands. And now..." She writes "FAILED" at the top of the page, "I wish I could just forget about them forever."

Dipper sighed, "Hey, if it's any consolation, my summer mission isn't a huge success either. I'm still trying to find the author of this journal, but with this laptop smashed, I've lost any lead in finding him."

Mabel looks at the laptop, "Wait a minute. Dipper, look!"

"Through your bottle?" Dipper asked.

Mabel nodded, "Just do it."

Dipper peers through the bottle, and notices a logo entitled "McGucket Labs" magnified on the back of the laptop, "McGucket Labs." Wait, Old Man McGucket?"

"You don't think?..." Mabel asked, looking up at the bulletin board.

"Couldn't be... Doesn't make any sense, unless..." Dipper starts connecting pictures and tying strings to the author, "This matches with this... This goes over here... And then the name... So that would mean... Old Man McGucket wrote the journals?!"

Wendy sighs, "Ugh! I can't get that terrible song out of my head."

"Oh, you mean "Straight Blanchin'" by 'Lil Big Dawg? It's the catchiest song of the summer," Soos informs her.

Wendy grimaces, "What is "blanchin"? Rappers can't just make up words!"

"Rappers are visionaries, Wendy. If they told me to eat my own pants, I would do it," Soos grinned.

Dipper, Mabel, and Will run inside.

"Wendy, Soos, we need to go see Old Man McGucket!" Dipper shouted.

Mabel smiled, "We'll explain on the way!" Everyone runs outside.

"Hey, what about work? Kids!" Stan pauses, "Why is Soos eating his own pants?"

Dipper frowned, "Old Man McGucket, are you here?"

"Visitors! Come, come." McGucket leads them inside, "Pull up some rusty metal. You're just in time for my hourly turf war with the hillbilly what lives in my mirror." He yells at his reflection in a bathtub, "Quit starin' at me when I bathe!"

"You can drop the act, McGucket. I know you're the author. You studied the mysteries of this town and wrote this book," Dipper holds up Journal 3.

Wendy smiled, "Dude, you're the genius Dipper's been searching for all summer!"

"Uh, genius? I'm no genius. I've never done nothin' worthwhile in my life. Everyone knows I'm no good to nobody. I can't remember what I used to be, but I must've been a big failure to end up like this," McGucket sighed.

Soos frowned, "But the laptop has your name on it."

"What about this book? Are you sure you didn't write it? Here, look closely," He flips through the journal.

McGucket sighed, "I told you, I don't recall. Everything before 1982 is just a blur. Just a hazy..." The journal flips forward to an image of the Blind Eye, the symbol of the society appear in his irises. He shrieks, "The Blind Eye! Robes, the men, my mind! They did something!"

"Who did?" Dipper asked.

"I... oh, I don't recall."

"Oh, you poor old man! No wonder your mind's all..." Mabel blows raspberry, "You've been through something intense."

"What if McGucket learned something he wasn't supposed to know, and someone, or something, messed with his mind? We've got to get to the bottom of this," Dipper admitted.

"Think, dude. What is the earliest thing you can remember?" Wendy asked.

"Uh, this is, I think," He pulls down a newspaper article.

Wendy smiled, "The history museum!"

"That's where we're going."

Everyone enters through the windows.

"Hello? Anyone here?" Soos asked.

Dipper smiled, "All right, keep your eyes peeled for anything suspicious."

Mabel sighs.

"Mabel, are you okay?" Wendy asked, "You just walked by a cat without petting it."

Mabel sighed, "Oh Wendy, everything I look at reminds me of failed romances. That formaldehyde heart. That romantic diorama. Even this poster of my most recent ex-crush." She pulls down a poster of Gabe, revealing a poster of Sev'ral Timez, "Aw, come on!"

Dipper, to McGucket, "So your last memory was here. Anything coming back?"

"Guys, look!" Down the hall, a shadowy figure runs away.

"Hey, who's there?" They run into a room filled with depictions of eyes.

McGucket frowned, "Well kettle my corn. He vanish-ified."

"It doesn't make sense. Where did he go?" Dipper asked.

McGucket sighed, "I feel like all these eyeballs are a-watchin' me."

"Wait... they are! Move aside," Dipper smiled.

McGucket moves aside, revealing a central eye.

Dipper pushes it and a staircase forms behind the fireplace, "A secret passageway."

Everyone goes down the staircase.

Dipper gasped, "Amazing. A secret society of evil mind erasers. I'll bet they erased your memory a long time ago. If we could find where your memories have been hidden, it could be the key to unlocking all the mysteries of Gravity Falls. All right, Mabel, Wendy, Will, you three stay here and make sure those robe guys don't come back."

Will nodded, "Alright."

"Soos, you, me, and McGucket are gonna go find the Hall of the Forgotten," Dipper smiled.

Soos' hat is sucked into pipe.

"Follow that hat!"

"Whew!" Dipper sees the hat, "There it is. Hurry!"

McGucket frowns, "Honey fogelin', saltlickin' skullduggery."

"Man, you have got to teach me some of those old-man swear words," Soos laughed.

Mabel sighs, "I just don't get it, you guys... I hug a lot, I can burp the alphabet, I have scratch and sniff clothing. Why does every boy leave me?"

"Pfft, who cares? Boys are the worst. You shouldn't get hung up, man," Wendy smiled.

Will glared at her.

"Maybe I come on too strong, you know?" Mabel asked.

Wendy sighed, "Well, what's your opener? Pretend I'm a boy." She puts up her hair, giving herself a mustache, "Mmm, testosterone."

Mabel, loudly shouted, HI! I'M MABEL! I'M TWELVE AND I OWN A PIG! WANT TO GET MARRIED?!"

Wendy laughs, "Honestly, that was perfect. You should just forget about guys, man."

"Wendy, that's it. Forget about guys!" Mabel picks up the memory gun, I just need to type "summer romances" into this thing, and I won't feel bad about them anymore."

"Whoa, hold up, Mabel. We don't even know what that thing does. You could accidentally erase, like, learning to read, or breathe, or..." Wendy stopped.

Mabel smiled, "Or one of those terrible summer songs you can't get out of your head?"

The boys, besides Will, are in the Hall of the Forgotten. Memory tubes are stacked to the ceiling.

Soos looked around in awe, "Whoa, look at all these tubes."

Dipper frowned, "People must've been getting their memories erased all over town. Whoa, look at this." He inserts a tube titled "Robbie V. Memories" into a viewing machine, "Why are they erasing peoples' memories? I still don't get it."

"Looky, fellers." He points to a tube labelled "McGucket Memories", "It's those words what people call me."

"Oh, dude, your memories. We did it!" Soos cheered.

"Grabby, grabby." McGucket takes the tube, which sets off an alarm, "I got it!"

Wendy sighed, "I don't know, Mabel. Are you really sure this is a good idea?"

"All ideas are good ideas!" Mabel smiled, before an alarm goes off.

"Do you hear that?" Wendy asked.

"The alarm in my brain is a-ringin' again. Ah!" McGucket shouted.

Society member, "Halt! Who's there?"

"Oh no!" Dipper shouted.

"Run!"

Society member, "Get back here!" They chase Dipper and Soos. McGucket hides.

Oh, you've really tarred it up now, Fiddleford. This is all your fault," McGucket frowned.

"Okay, I think we're safe." Hands reach out from the shadows and cover Dipper and Soos's eyes.

"We playing "Guess Who"? Dude, I know it's you, Dipper. Such big... strong hands..."

Everyone, including Mabel, Will, and Wendy, are tied to a pole.

Blind Ivan scowled, "You shouldn't have come here. We do not give up our secrets lightly."

"Who are you bathrobe-wearing freaks?" Wendy asked.

Dipper asked, "Why are you doing this?"

"What's with your creepy British accent?" Mabel asked.

Will glared at her, not saying a word.

Blind Ivan sighed, "Well, I suppose we are going to erase your minds anyway." One by one, the Society members unmask, "And you've never met me before. And if you had, you wouldn't remember." He removes his hood, revealing a bald tattooed head and a red scar through one eye, "I am Blind Ivan, and we are the Society of the Blind Eye. Formed many years ago by our founder... our founder... Does anyone remember who he was?"

Dipper frowned, "Why would you do all this? What do you have to gain?"

"As you have no doubt discovered, Gravity Falls is a town plagued with supernatural strangeness... and that includes Mr. Light Blue Hair over here. No one knew how to stop the things that went bump in the night, so our founder invented the next best thing: a way for us to forget. We took it upon ourselves to help the troubled townsfolk by erasing the memories of the strange things they've seen. Now the people of Gravity Falls go about their lives ignorant and happy, thanks to us. And as a perk, we help ourselves forget things that trouble us. Everyone has something they'd rather forget. In fact, your own sister was about to use that ray on herself. Isn't that right?" Blind Ivan asked.

Dipper frowned, "Mabel? Seriously?"

"Ha ha, maybe..." Mabel laughed.

Dipper frowned, "Don't you see? This is ruining lives! What about Old Man McGucket? He lives in a hut and talks to animals, thanks to you. Don't you feel bad about that?"

"Mmm, maybe a little." Blind Ivan shoots himself with the ray, "But not anymore. You won't be telling anyone else what you've learned here. Say good-bye to your summer." He aims the ray gun at them.

Soos frowned, "Guys, if we're gonna forget everything, I got some stuff I wanna get off my chest. Mabel, for half the summer, I thought your name was Maple, like the syrup. No one corrected me!"

"I only love some of my stuffed animals, and the guilt is killing me!" Mabel shouted.

Dipper frowned, "Sometimes I use big words, and I don't actually know what they mean. I mean, I'm supposed to be the smart guy. If I'm not the smart guy, who am I?"

"Okay, I'm not actually laid back. I'm stressed, like, 24/7. Have you met my family?" Wendy asked.

Will started crying, "I don't want to die... I really don't want to die... Axolotl, I'm sorry... I'm sorry for not stopping him from destroying our home..."

Blind Ivan sighed, "Oh, stop being a bunch of babies." McGucket jumps down and knocks away the gun, "Owie!"

"McGucket?!"

"I raided the mining display for weapons. Now fight like a hillbilly, fellers!"

Everyone grabs a weapon: banjos, stuffed raccoons etc. Soos grabs an informational display about dysentery.

Soos sighed, "Oh, nobody better miss!"

"They know too much. Don't let them escape!" Blind Ivan shouted.

Wendy, attacking a society member, "Get this song outta your head!"

"Dysentery's gonna get you, dawg!"

Dipper smiled, "McGucket's memory tube."

"Oh no you don't!"

Dipper puts the memory tube into a transport tube. It zooms around the room, "Mabel, catch!"

Blind Ivan scowled, "Give me that tube."

"Never!" Dipper shouted, "That memory belongs to McGucket!"

Blind Ivan frowned, "The Society's secrets belong to us." He has the group in a corner and points the ray at them, "End of the line. By tomorrow, this will all seem like a bad dream. Say goodbye to your precious memories." He fires the gun.

Dipper screams, "NO!" He shields his eyes, but finds McGucket has jumped in front of the group, catching the ray, "McGucket, you took a bullet for me." As McGucket gets shot with the ray again, "Oh my gosh! Are you okay!"

"Okay as I'll ever be!" McGucket laughs.

Dipper is confused, "What?"

Blind Ivan keeps shooting at McGucket, who slowly walks toward him, "Why... isn't... this... working?"

"Hit me with your best shot, Baldy. But my mind's been gone for thirty-odd years. You can't break what's already broken! Say goodnight, Sally!" McGucket headbutts Blind Ivan.

The Society members are tied up.

Blind Ivan scowled, "Unhand us!"

"It isn't so fun being tied up, is it? Hey, wanna draw on their faces?" Mabel asked, "Tra-la-la..." She crosses out Ivan's "knowledge" tattoo and replaces it with "butts".

Blind Ivan scowled, "Hey, stop that! That's not funny."

"It's pretty funny," Dipper smiled.

Soos laughed, "It's, like, objectively funny."

"We'll have our revenge. We'll never forget what you've done."

"Oh, I think you just might." Dipper holds up the ray gun, "Say cheese."

The Society members, in normal clothes, are walking out of the Museum.

Dipper smiled, "Thanks for visiting the Museum for Gold Miner Appreciation Night. Be sure to tip the gold miner on your way out."

"I'm sorry, but what's my name? Where am I?" Blind Ivan asked.

Dipper frowned, "Oh, might have overdone that one."

"Your name is Toot-toot McBumbersnazzle. You're a traveling banjo minstrel, with a song in your heart, and funny tattoos on your head," Mabel smiled, handing him a banjo.

"Yes, I am Toot-toot McBumbersnazzle. Cheers!" Blind Ivan walks away, singing, "Toot-toot is my name..."

"All right, McGucket, are you ready to see your memories? Find out who you really are?" Dipper asked.

McGucket frowned, "I'm not so sure. What if I don't like what I see?

"We've come all this way. Go on," Mabel smiled.

McGucket puts the tube into the machine. An image pops up on the screen of McGucket, 30 years younger.

McGucket, on tape, "My name is Fiddleford Hadron McGucket, and I wish to unsee what I have seen."

Everyone, besides Will, gasped.

Younger McGucket explains, "For the past year, I have been working as an assistant for a visiting researcher. He has been cataloging his findings about Gravity Falls in a series of journals. I helped him build a machine which he believed had the potential to benefit all mankind, but something went wrong. I decided to quit the project. But I lie awake at night, haunted by the thoughts of what I've done. I believe I have invented a machine that can permanently erase these memories from my mind." He holds up the memory erasing ray, "Test subject One: Fiddleford." He shoots it. The screen goes to static and comes back on, "It worked! I can't recall a thing." Static, lab is in disarray, "I call it the Society of the Blind Eye. We will help those who want to forget by erasing their bad memories!" Static, McGucket is more disheveled and nervous, "Today, I came across a colony of little men, very disturbing. I would like to forget seeing this." Static. McGucket's lab is a mess and his arm is in a cast, "I accidentally hit another car in town today. I feel terri-bibble! Terrible. I've been forgetting words lately. I wonder if there are any negative side effects..." static. McGucket has a beard and is filming from a motel, "I saw something in the lake, something big!" static, "My hair's been a-fallin' out, so I got this hat from a scarecrow. Hey, are my pants on backwards?" static. McGucket is wild-eyed and filming from the junkyard. Maniacal giggling and speaking gibberish, "Yroo Xrksvi! Girzmtov!" The tape ends.

Mabel frowned, "Oh, McGucket, I'm so sorry."

"Aw, hush. You kids helped me get my memories back, just like you said," McGucket smiled.

Mabel frowned, "But did you want those memories back?"

"After all these years, I finally know who I am. Maybe I messed up in the past, but now that I seen what happened, I can begin to put myself together again," McGucket sighed.

Dipper asked, "So, wait. You weren't the author, but you worked with him. Do you remember who he was?"

"It's beginning to come back, but I need more time. And reading glasses. Heck! I got some rememberin' to do," McGucket smiled.

Wendy looked over at Mabel, "So Mabel, you still wanna erase those failed summer romances?"

"You know, no one likes having bad memories, but maybe it's better to remember the bad things and learn from them than to go all denial crazy trying to forget," Mabel frowned.

Wendy nodded, "That's some mature junk right there, Mabel."

"Yep. Miss Mature. That's me. Hey, you wanna help me vandalize this picture of my jerky ex-crush?" Mabel asked, before they all doodle on a picture of Gabe.

Wendy gets into the car, "Hey, you know what? Going on this big adventure actually made me get that stupid song out of my head."

"Nice." Soos starts the car. "Straight Blanchin" plays.

"Oh, come on!"

McGucket, sitting in the back of the car with Dipper, flipping through the journal, "It's all so familiar. It's almost like I can remember..."

Stan, pouring fuel, "All right, you're getting closer. Every day it's getting stronger." A gust of wind grabs his notebook and mug and sucks them into the portal, "Haha, yes!" A flying pipe hits his hand, "Ah!" Bandaging the bloody wound, "I don't care if it's dangerous. I don't care how long it takes. I'm gonna pull this off, and no one's gonna get in my way!"

Later that night...

"Will... can I ask you who Axolotl was, and what you were talking about earlier, when you were saying that, 'you were sorry for not stopping him from destroying our home'... who were you talking about? Did someone destroy your home? Who? Why?" Dipper asked.

Will bit down on his bottom lip, "I'm not telling you who the Axolotl is, but... I was talking about my twin. He destroyed our home dimension. We were the only ones who survived... I already told you he was a nutcase. Well... he still is."

"Okay... that's really sad," Dipper admitted.

Mabel frowned, "Do you need a hug, Will? I mean... you practically lost everything and... someone you loved was at the fault for it... are you okay?"

"Yeah, I'm okay..." Will wiped the tears away from his eye, "I don't need a hug... I'm fine..."

"... could you tell us who your twin is?" Dipper asked.

Will shook his head, "No... you won't like it..."

"... can you tell us about the deal you wanted to make?" Mabel asked.

Will nodded, "I'll protect you from my twin, and... if The Author comes back, you will protect me from him."

"Why? Why do you want us to protect you from The Author?" Dipper asked.

Will sighed, looking down at the floor, "The Author... kind of doesn't like my twin... and he might... if he comes back... he might think I am him, and... try to hurt me... or even kill me..."

"We wouldn't let that happen to you, right Dipper?" Mabel asked.

Dipper sighed, "No... I'm assuming only then we'll know who your twin is? Because... you don't want us to know for some reason?"

"Yeah... I'm sorry, but... I'm really scared of what you'll think of me, considering what he's done... I'm scared that you'll judge me," Will frowned.

Mabel smiled, "My opinion isn't going to change, I can promise you that! You're really cute and adorable, and you're really nice!"

"... Thanks, Mabel..." Will blushed, staring at the floor.