In which Dipper 13 is given a sharp dig by the townsfolk of Gravity Falls.

The last few purple rays of the sun shone out over Gravity falls as Mabel, Wendy, Soos and a clone of Dipper pulled up by Sheriff Blubs' house. They looked around nervously before walking up to the door and knocking.

After a few seconds, Blubs himself opened the door. The man looked the four up and down before running through a giant list on a clipboard and crossing their names off.

"You four are free to go…inside." The Sheriff pushed open the door a little wider to let them through. "Everyone is out in the yard. Enjoy the refreshments."

"Ooh, refreshments!" Soos rubbed his hands together.

"It's just water."

"Aww…"

They moved through the house, quickly noticing a rather disturbing hole in one of the bedroom walls that was fenced off with police tape. Then they opened the back door into the yard, and stopped.

The place was absolutely packed, as one would expect from inviting an entire town over to one house. There were two tables on either side packed with water bottles, but other than that the guests were crowded in the middle, talking in low, nervous voices.

"This is…" Mabel started.

"I know." Dipper's clone crossed his arms. "It's the most tense sleepover I've ever been to."

"I was going to say it was the most-" Mabel stopped. "Wait, you knew what I was going to say?"

The clone blinked. "Yeah? We do that all the time."

"My brother and me do it all the time." Mabel gave the clone and odd frown, walked away and and checked her phone, leaning against a wall. She pulled up Dipper's profile and sent him a text:

Arrived at sleepover. How are you? x

"Mabel." There was a familiar voice, and Mabel looked up to see Pacifica standing in front of her, holding a bottle of water.

"Oh, Pacifica!" Mabel put her phone away and smiled. "How, uh, how are you?"

She flipped around and leant back on the same wall, letting out a huff of frustration. "Doing horrible! This werewolf business is awful."

"Yeah." Mabel looked downwards. "More than you can imagine, hah."

Pacifica unscrewed her water bottle. "More than you can imagine! I was the one who fought off that monster a night ago, remember?"

"Oh, yeah. Are you okay?"

"I broke, a nail!" She fumed, much to Mabel's surprise. "Now everyone's telling me to get over it! But, like, just because I'm poor now doesn't mean I have to have gross nails, know what I mean?"

Mabel didn't answer. She reached into her pocket and wrapped a hand around her phone, staring nervously at the near-night sky. Dipper hadn't texted back yet.

Meanwhile Pacifica had unscrewed her water bottle, and as she lifted it to her lips Mabel caught sight of a label clearly reading 'Bottled in Gravity Falls.'

She made a face. "Pacifica, I wouldn't drink that."

"What? Why?"

Mabel thought back to that night, when the twin's only concern was catching a mysterious man who kept going into the woods. Everything was different now.

Meanwhile, Pacifica had picked up on the girl's loss of concentration and began waving a hand in front of her. "Mabel? Don't zone out on me like that, weirdo. What were you going to say about the water?"

"Sorry, Pacifica!" Mabel brushed some hair out of her eyes. "Well there was this guy bathing in the reservoir… so it's probably all soapy and hairy and stuff. Bleck!"

"Riiight. So did you just forget to tell your brother, or does he think you're crazy like me?"

"Wha?" Mabel looked over to see Dipper standing by the edge of the crowd, unscrewing a bottle of water. "No, wait!"

Dashing up to her brother's clone, she quickly knocked the water bottle out of his hands.

"Whoa, Mabel, what was that-!" The clone blinked in realization. "Right, no water."

"Darn right, no water!" The two turned to see McGucket crop up next to them. "Them werewolves drink the stuff, it can't be good!"

Dipper's clone blinked. "Yeah, like all living things."

McGucket shoved a small vial of clear liquid into both of their hands, seeming not to hear Dipper's clone. "Besides, you kids'll need holy water to bring down a werewolf! Yoohahahaha!"

Mabel's phone buzzed.

"Uhhh, thanks, McGucket." The clone laughed nervously and handed the vial to Mabel. "But we're gonna go now, okay? See you, around!"

McGucket watched them go, an unusually suspicious look on his face.

Meanwhile Mabel and Dipper's clone over to the side of the house, away from the main crowd of people. There Mabel got out her phone and surely enough, there was a message from Dipper:

I'm okay, just feel sick. How are you?

Mabel made a face. Unlike a lot of people, she never really had a problem with answering that particular question honestly, but right now 'I feel lonely' didn't quite feel like an appropriate response.

"Hey," Mabel looked up to see Dipper's clone, his arms outstretched in a familiar shy hug position. "I know you probably would prefer, uh, somebody else to be here, but a hug's a hug, right?"

Her face formed a warm smile, and she hugged the clone back. "Thanks, Dipper 2."

"More like… 13, I think."

"Haha, good thing I'm not superstish...something!" Mabel quickly texted her brother back that she was fine. Then she frowned and looked back up. "Hey, uh, you don't feel sick or anything, right?"

"Nope." The clone put his hands in his pockets. "I don't even think I have nerves."

This of course prompted Mabel to pinch the clone's arm, to which he did not react. "Can't you feel that?"

"Nope."

"Cool!" Mabel laughed. "Silly me. You're made of paper, how are you gonna turn into a-"

Sheriff Blubs burst through the door right next to them, the mayor following him, and Dipper's clone slapped a hand across the girl's mouth. The two nervously watched the Sheriff walk into the crowd, people growing quiet and parting as he approached. Then he turned and faced the crowd, and cleared his throat.

"Good evening, everybody." The Sheriff flipped through the clipboard of names as Mayor Cutebiker took his place just behind him. "We have everyone here – except for my poor Deputy Durland – which means only one thing. The werewolf is one of the people standing next to you, right now."

A low titter spread through the crowd. Mabel put her hand in her pocket and grasped her phone. She then felt a hand on her shoulder and looked up to see Wendy and Soos standing next to her, understanding smiles on their faces. She smiled back.

Then McGucket popped out behind them and gave a wave, and Mabel quickly turned her attention back to the Sheriff.

"And I have a message for that werewolf!" Blubs spread his arms underneath the rising full moon. "You may think you're safe to pick us off one by one, but the people of Gravity Falls will not stand for it!"

There was a cheer, and it seemed all of a sudden the crowd was armed with silver forks, crosses, pitchforks. In the darkness they were faceless silhouettes.

Mabel's phone buzzed.

"You may think you're safe to hurt the people we care about," Blubs continued. "just because you have two faces! But you are not above the law! Tonight, we will find you, and we will bring you to justice!"

As Mabel was drawing out her phone, she had a powerful feeling that somebody was watching her. The girl looked up and saw McGucket staring daggers into her eyes, then down at her phone, then back again.

The message was clear. She put the phone back in her pocket even as it buzzed again.

"That's all." Sheriff Blubs turned to the mayor. "Is there anything you'd like to say?"

The mayor took a deep breath. "Get 'em, get 'em!"

And the crowd erupted into cheering. Mabel cringed, feeling her phone buzz once again. Then she saw something drop in her peripheral vision, and turned to the clone of Dipper.

He had fallen over, and had gotten himself up onto his hands and the balls of his feet. "Whoa. That was weird. Mabel?"

Mabel was staring at the scene, her eyes fixed to the clone's legs, which looked very odd in a way she couldn't quite pinpoint for a moment. That's when she saw it; the clone's ankle joints seemed much further up his legs than they should have been, the bottom of his feet lengthened and his knees forced forward in a way that seemed very… wolflike.

"Mabel?" The clone looked down at his hands, and saw that they were already shrunken and clawed. "Mabel!"

Time seemed to pass in a strange slow motion for Mabel. There was a scream, something grabbed her, something grabbed the clone, voices, loud voices, shouting-

And a pitchfork impaled through the stomach of the clone that looked exactly like her brother.

"Dipper!" Mabel reached out one hand, but she was being pulled away by somebody. Instinctively she tried to fight it, digging her heels into the ground and grabbing hold of a nearby door frame.

"It's okay!" Dipper's clone shouted back. "Go to the Mystery Shack! Make sure Dipper's-" And he was swallowed by the dark crowd.

Mabel felt another sharp tug, and she turned to see it was Wendy who was pulling at her arm. "Come on Mabel! We've got to go, now!"

She started running through the house, out the door, and she didn't look back.