It was just another seemingly average summer evening in the sleepy town of Gravity Falls, Oregon. The dim glow from the last remaining rays of sunlight cast spooky shadows on much of the town and a cool breeze was brought in from the falls, making it slightly chillier than usual. Other than that, nothing seemed too out of the ordinary just yet.

Dipper and his twin sister Mabel were in the attic of their great-uncle's 'tourist trap' the Mystery Shack. Dipper was laying on his bed reading, as usual, and Mabel was brushing her hair in front of their mirror. Her brother didn't think much of what she was doing, it was pretty normal for her to brush her hair for lengthy amounts of time. But when he heard a knock on the door and saw her jump up excitedly, he couldn't help but wonder what was going on. As he glanced up at her he noticed she was wearing a sparkly striped sweater, silver dangly star earrings with a matching necklace, and she had a flower in her hair. She looked awfully nice, and it made him a bit suspicious all of a sudden.

"Where are you going?" He asked, his voice sounding a bit more shocked than intended.

"Oh, just a date; it's no big deal. He's not a bunch of gnomes or a tiny psycho, I promise." Mabel told him over her shoulder as she practically skipped to the stairs.

Mabel met her date at the side door and gave him a hug. He looked slightly older than her, with long dark brown hair and a plaid blue hoodie on. "Noah! Hi! I missed you!" She said, still hugging him tightly.

Instead of really greeting her back, he just smiled oddly. Something about him seemed kind of…off. Once she finally let him go, Noah started leading Mabel through the wooded area behind the Mystery Shack, heading toward the lake.

The twin girl shivered as a gust of wind ruffled her long brown hair. She grabbed her date's hand and let out a small gasp. "Wow! You're super cold!" She exclaimed.

Noah shrugged at her comment, but he appeared to be growing slightly uneasy all of a sudden. "Yeah, it is pretty chilly tonight." He told her.

"Maybe we should go somewhere else for our date? I mean, as much as I enjoy walking with you out here, I wouldn't want my handsome boyfriend being too cold." Mabel said with a wink.

"Oh, it's alright. I'm not too cold. Besides, I just wanted to make sure we were alone." Noah said with an almost devilish grin.

Mabel's cheeks turned bright pink and she let go of her boyfriend's hand to give him a playful punch on the arm. "You scalawag!" She giggled.

The dark haired boy suddenly turned to face her, still smiling his odd looking smile. "Oh, yes. I'm quite the scalawag indeed, hmm?" He purred. He brushed a strand of her hair behind her shoulder and ran a cool finger along her neck.

Mabel's eyes widened and she took a step back. "Whoa there, tiger. I know I'm irresistible, but well…this is only our first date. So.."

Noah let out a quiet chuckle, his eyes almost glowing in the dim light. "And it will be our only date." He said, taking another step toward her.

"Are you breaking up with me already, mister?" Mabel asked, puffing up her cheeks and pouting.

"I guess you could say that." The strange boy agreed, his upper lip curling back in a wide grin and revealing pointed canine teeth.

Mabel let out a gasp, trying to back away from him. But it was no use, he was too fast. In one swift motion, the distance between Mabel's neck and Noah's teeth was closed. The twelve year old girl's high-pitched scream echoed through the forest.

Dipper awoke with a start. He lurched up from his bed and looked across the room to find that his twin was still sound asleep. The young boy let out a sigh of relief and wiped the sweat from his forehead. "Just a dream…" He quietly reassured himself.

He spent the rest of the day trying to forget his nightmare, but his sister's scream just kept repeating in his head. Every so often he swore he caught a glimpse of the vampire's glimmering eyes watching him. Every time he looked at Mabel a strange sense of fear would surge through his body. Even if it was just a dream, he didn't want to lose his sister.

"Hey bro-bro, why you ackin' so cray-cray?" Mabel finally asked as she noticed Dipper looking at her strangely for what she guessed was the twentieth time that hour.

Dipper flinched and smiled nervously. "What do you mean? I'm not acting cray-cray or…whatever. Ha. It's-It's nothing, nothing at all." He replied, maybe a bit too quickly. He had never been all that good at lying. Of course, Mabel saw right through it immediately.

"Oh c'mon, you can tell me." His sister insisted, moving closer to him and giving him a warm, innocent smile. Dipper hesitated for a moment.

"I just…I had a nightmare that's all." He muttered.

Mabel gave him a quick hug. "Aww, poor Dippy. Next time you have a bad dream, you can sleep in my bed, like when we were younger." She said, trying to somehow comfort him.

Dipper was about to politely reject her offer, but he just kept thinking about his dream. Watching Mabel die somehow made him appreciate her 'weirdness' a bit more.

A few days after Dipper's nightmare, Soos invited the twins to go to the arcade with him. Dipper figured it would be a good way to get over his nightmare. Maybe he just needed to leave the shack for a bit. He and Mabel were playing Frog Time, when suddenly he got the feeling that something was watching them. He glanced over his shoulder to see a dark haired boy who looked slightly older than him wearing a plaid blue hoodie with the hood up. Dipper tried to hold in a gasp. He looked exactly like the vampire boy in his dream!

Noticing that Dipper was looking at him, the boy gave him a smile. For some reason, it sent shivers down Dipper's spine. "Hey, mind if I play next game?" The boy asked. Dipper didn't respond; he was too shocked to do much of anything, really.

Since Dipper wasn't paying much attention to the game anymore, he and Mabel ended up losing only a few seconds later.

"Aw man! What the hay-hay, bro?!" Mabel groaned, looking over at her brother accusingly. At that point, she finally noticed the boy standing behind them, and her face lit up. "Oh. My. Gosh. Hiya! I'm Mabel! What's your name?"

"Noah." The boy said with a grin, his eyes gleaming as soon as he looked at Mabel.

The young girl blushed and pointed toward the game. "Wanna play?" She asked, fluttering her eyelashes.

"I think I need to go sit down…" Dipper muttered before turning and speed-walking toward the exit of the arcade. He sat down on the sidewalk outside and stared blankly ahead. "It's just a coincidence." He told himself. "He won't want to date Mabel, right? Plus, he can't be a vampire. Why would a vampire go to an arcade?"

Suddenly, Soos was kneeling down next to him. "Sup, little dude?" He asked.

"Soos, do you believe nightmares can come true?" Dipper asked with a sigh.

"Uh…I dunno, man. Why?"

"Well, I had this dream about Mabel dating some weird guy, and the guy just randomly showed up when we were in the arcade. I've never seen him before besides my dream! And now Mabel is flirting with him!" The younger boy explained, shaking his head in disbelief.

"Whoa, mind blowing. Maybe it's just some kind of weird coincidence?" Soos suggested.

Dipper sighed again and nodded hopefully. "I hope you're right…" He whispered.

A few hours after leaving the arcade, Dipper decided to do some reading to get his mind off things. He began to reread a few of the first pages in the mysterious book he had found that contained some of the mysteries of Gravity Falls. There was always something new to learn every time he opened it. He couldn't help but feel like he and the author had some type of connection, even though they'd never met. As he read through the page about floating eyeballs, he heard a knock on the door. With a gasp, he looked up from the book to see Mabel jump up excitedly and start skipping toward the stairs. She was wearing the exact same outfit from his nightmare.

"Where are you going?" Dipper asked breathlessly. Mabel blushed in response to his question.

"Oh, it's just a date. No big deal. He's-"Mabel began.

Dipper cut her off. "Mabel. Please don't go on that date. Just, trust me. I think I found something and…I just need you here with me. I need your help. Okay?"

Mabel huffed and rolled her eyes. "This again? C'mon, Dipper! Don't be so overprotective all the time. Let me follow my dream!" She said, her eyes lighting up. "Summer romance!" She sighed dreamily. With that, the slightly older twin skipped out the bedroom door and down the stairs.

Dipper followed as quickly as he could, and made it downstairs just in time to watch Noah and Mabel leave the Mystery Shack. "Oh no." He muttered, shaking his head. Dipper ran back up to the attic to retrieve his book, then followed his sister and her date through the woods at a safe distance. He skimmed through the book as he went, meanwhile keeping his eye on Noah as best as he could. Finally, he managed to find a page about vampires. "Weaknesses: Sunlight, silver, fire and a wooden stake to the heart." Dipper whispered. "Ugh! I don't have any of those! And there's no time!" He muttered in irritation. He looked up and found out that he had even less time than he thought. Mabel had just grabbed Noah's hand. A few moments later as Mabel let go of the boy's hand to give him a playful punch on the arm, Dipper noticed her star necklace making a soft jingling noise. It glimmered bright and silvery in the quickly fading light. "Silver! That's it!" Dipper gasped, proceeding toward the two determinedly and as stealthily as he could.

"Something like that." He heard Noah say.

"No! Get AWAY from her!" Dipper screamed, jumping forward and nearly ripping Mabel's necklace off her neck.

Noah hissed and took a step back.

Dipper held up the necklace threateningly then lunged at Noah. Noah was quick, but not quick enough. As soon as the silver came into contact with his skin, Noah let out another hiss and he became noticeably weaker almost immediately. Dipper took this opportunity to wrap the necklace around one of Noah's wrist.

Mabel looked completely shocked about the whole situation; she wasn't entirely sure what to think. "Dipper, what the heck are you doing?! I don't even…" She mumbled, looking confused.

"He's a vampire Mabel." Dipper explained. "Silver is his weakness, and he was just about to drink your blood!"

"What? No, Dipper!" Mabel gasped.

Dipper ignored her remark and pushed Noah against the closest tree, tying his arms to a low branch with the necklace. "Just wait till the sun comes up, blood sucker! That's for trying to make a meal out of my sister!" He turned to his twin and grinned victoriously.

"Dipper, you were following us?!" Mabel asked, looking upset. "You really couldn't trust me?"

Dipper tilted his head in confusion and looked at his sister questioningly. "Mabel, I just saved your life." He told her, motioning toward the vampire.

"That's not the point! You can't even let me go on one stinkin' date alone! And how do you know he's not a friendly vampire, huh?" Mabel asked, narrowing her eyes accusingly.

"I-Well…" Dipper stuttered, avoiding his sister's gaze. He was drawing a blank. How could he explain his nightmare to his sister? It's not like she's even believe him at this point.

"Exactly." The usually cheerful girl muttered, glancing at Noah one last time before sulking away.

"How did your date go, kiddo?" Stan asked with a smirk as Mabel walked past the living room on her way to her and Dipper's room in the attic. The young girl let out a little whimper. "What? Was it that bad? Did he break up with you or somethin'?" Her great uncle asked, raising an eyebrow. Usually he tried to stay out of the twin's business as best as he could, it's not like he cared anyway…well unless it was about something entertaining like a fight. But his niece looked so upset that it kind of worried him.

"Something like that." Mabel sniffled, walking into the room and plopping down on the ground near her great-uncle's chair.

Stan sighed and muted the TV. "Well, what happened?" He asked, trying not to seem too interested.

Mabel looked up at him and pouted. "Dipper followed us! He's so paranoid! A-and then him and Noah got in a fight. Now I'll never see Noah again, which stinks because he was totally my type! AND I lost my necklace!" She told him, holding back tears near the end. "And the worst part is: Dipper was actually right! Noah really was a bad guy." Mabel sighed. "I can never date normal boys…But I got mad at Dipper and we ended up fighting..."

Stan stared at his great-niece for a while, not sure how to respond to what she had told him. "Uh…Wow. Sounds like you had quite the date, Mabelangelo." He said finally, shaking his head.

"Ha, you don't even know the worst of it." Mabel grumbled, mostly to herself.

"Well, hey, at least you know your brother has your back, right? He's paranoid 'cause he cares about you. And you'll find a 'normal' guy someday, don't be in a rush." Stan told her with a shrug, turning the sound on the TV back on to avoid further conversation.

Mabel smiled and got up to give her grunkle a hug. "Thanks, Grunkle Stan!" She giggled, giving him a tight squeeze.

"Uh-no problem, kiddo." Stan mumbled, awkwardly patting her back as she hugged him. "Now get off me, my show's on."

Dipper trudged through the shack, feeling kind of bad about making Mabel so miserable, even if he did save her life. He glanced into the living room and saw Stan and Mabel watching television together. Mabel seemed a bit happier already.

"Uh... hey Mabel, can we…talk?" Dipper asked as he walked into the room.

Mabel shrugged and silently followed him up the stairs and to their bedroom.

"Look, I'm sorry about your date. It's just…I had this dream…" He told her, sitting on his bed with a sigh.

Mabel sat down next to him and gave him a questioning glance. "Uh-huh. Keep talking." She said, not sure how a dream had anything to do with her date.

"Well, I had a dream where you were getting ready for a date, and then Noah showed up. He brought you into the forest, drank your blood and killed you." Dipper explained, sighing and hiding his face behind his hands.

Mabel looked pale all of a sudden. "Not funny, Dipper. Knowing he was a vampire is one thing. But don't joke about stuff like this."

"I'm not joking!" Her brother snapped. "It was so real. And everything happened almost exactly the same as tonight…"

"W-when did you have the dream?" Mabel asked shakily, still not entirely sure she believed what he was saying.

"A few days ago, the day I told you I had a nightmare."

"Oh, right. Well, does it say anything about nightmares coming true in the book?" Mabel asked, pulling the book out from underneath Dipper's pillow.

"I already looked, there wasn't anything about it. This book is mostly about creatures. Maybe we should check again though." Dipper suggested. Suddenly, there was a gentle knock on the door. It took the twins by surprise. Grunkle Stan hardly ever came up to the attic.

Mabel tried to shove the book back under Dipper's pillow, but she wasn't quite quick enough. Just as the door opened, the book slipped to the floor and opened to a random page.

"Huh? What's-"Stan began, leaning down to pick up the book. His eyes widened with shock.

"No!" The twins screamed in unison, but it was already too late.

"No. No, no, no! You two should not have found this! Especially so soon…" Stan groaned, rubbing his temples. "Here I was thinking I was doing my best to keep you out of it till you were older, thinking you guys might actually get to be normal for a while. But of course not. Ugh!" He shook his head. "You're losing it, Stan."

The twins exchanged a glance. "What do you mean we shouldn't have found it 'so soon'? You know what it is?" Dipper asked eagerly.

"You just realized you're losing it?" Mabel chimed in.

Dipper elbowed her.

"Wait, you mean you guys haven't figured it out yet?" Stan asked, raising an eyebrow curiously.