It all started a seemingly normal day in Gravity Falls. Dipper and Mabel are walking through the surrounding forests of the strange town, after an eventful all nighter trying to find clues on their most recent monster hunt. Needless to say, their search had been without any finds.

"You have to believe me," Mabel pleaded, "It really did see it! It was one of those thingies in your book!"

Dipper sighed, "It's not that I don't believe you Mabel," he replied, "I just don't think it was Shadow Bugs that you saw. We just need to get back to the Shack. We were out all night, Stan might notice were gone if we don't get back soon."

Shadow Bugs had had a page of it's own in Book 3, and they were what Mabel had claimed to have seen. What made Dipper skeptic, however, was what little was written of them. The page only showed a large picture, and what could be read was gibberish. They continued their way back to the building, Mabel following behind Dipper, his hand holding hers (she tended to get lost quite easily). He had to admit, he was completely exhausted. He couldn't understand how Mabel could possibly still want to continue the search.

Tap.

The sound faded as soon as it came.

"What was that," Dipper asked.

"What was what," Mabel asked, pausing in her steps.

Dipper thought briefly, "It was probably nothing, let's just go," he concluded.

TAP.

They both heard it this time.

"Alright, that definitely was something."

Suddenly, a rustling was coming from further into the woods. It seemed to increase only further and further in volume, the plants moving along with what ever it was. And then they saw it.

"Shadow Bugs," They both whispered quietly. The purple like dust bunched up as it came fully into view. It was forming something, something larger. A large creature formed from the amassing bugs, conjoining together in one large entity. It approached closer and closer, Mabel and Dipper now backing up to gain distance. Dipper reached slowly into his vest pocket, searching carefully for Book 3. He guessed that the only means of action could be to check the entry once more. Mabel had noticed this, though, and before the monster could get any closer, she grabbed him by arm in attempt to get him to run. He didn't need any further motivation. As soon as Mabel had done this the creature had noticed the sudden movement and gave chase after them. They had a small head start as they ran in sheer terror from the creature.

After only seconds, the monster had become dangerously close, it's steps the equivalent of five of the twin's. The creature began to actually fire at them, large blasts of shadows reaching their direction. The first couple had missed, just barely, but the third had a set target. Dipper had been the target. And he noticed this. He braced himself for the hit, sure that it will hit him. Sure, that is, until he doesn't feel the impact. He reluctantly opens his eyes, and he then sees the reason for this. Mabel had shielded him, he body now a trophy, as she lays on the forest floor.

The monster is now extremely close. Dipper reaches out in an attempt to revive her of her state, but he feels a hand pull him away with a strange strength as it takes him behind a tree. He tries to scream for help, but the same hand covers his mouth and silences him instead. He looks at his captor, only to see a kid about his age that is wearing old-fashioned clothing on.

"Don't make any sound", the boy whispers, a clear British accent accompanying his words, "Do you want to be caught as well?"

The two remain quiet, the only sounds being the monster's steps as it leaves the area. It is after all of this that the boy finally releases the flailing Dipper from their uncomfortable position. Dipper immediately gets up and returns to where Mabel had been. Except she isn't there. She is nowhere to be seen.

"Mabel," Dipper yells out. "Mabel, where are you?"

The boy cannot bear to watch this from the sidelines, and he reluctantly leaves the hiding spot, while wearing a sad expression. "It's already gotten her," he informs Dipper.

"It wouldn't have if you didn't take me away from her," Dipper raised his voice, both in anger and grief.

"How is this my fault now," the boy asked, "Listen, I apologize for taking you away so suddenly, but it would have gotten you too if I didn't help you!"

He was right. "I'm sorry, you're right," Dipper replied, regaining a certain calmness, "But now what am I supposed to do? That thing got Mabel...wh-what if she's..."

"She is still alive and well," The boy interrupted, "She will be fine. You can't be hurt when you are under trophy state. I know this because the Professor had assured me of this."

"The Professor," Dipper asked.

"Professor Hershel Layton," the boy informed, "He's my mentor. My name is Luke Triton, I am his assistant. May I ask what your name is?

"Dipper Pines," Dipper replied, "That girl I was with was my twin sister, Mabel."

"Dipper," Luke asked with an amused tone, "What an odd name! An asterism as a name...may I ask why that is your name?

"Well...I sorta have this...birthmark,"Dipper droned, "Look, it's not important! Luke, I have to find my sister, do you have any idea where she might be?"

"Hmm..." Luke pondered, "A creature of similar stature had also taken away the Professor not long before I ran into you. If these two monsters are anything alike, they must have gone off to the same location with both of our missing friends."

"That's a pretty good deduction," Dipper replied, "Hey, here's a crazy question...why don't we team up together? I mean, were both going to the same place, and it would probably be easier for both of us to fight one of those things with someone to help..."

"I was just about to suggest we do the same thing, Dipper Pines," Luke said with enthusiasm.

The pair walked through the woods, heading towards the direction they had seen the monster leave to.

"Hey...", Dipper spoke up, "I'm really sorry for yelling at you back there. I was just really upset that Mabel is gone. I know that you were just trying to help-"

"-You don't have to apologize," Luke interrupted, a reassuring smile on his face, "it was completely normal that you were upset. But...if you wanted to really make it up to me...there is one thing you can do..."

Dipper felt a bit worried, "...Yeah, what is it?"

"Could you show me your birthmark, please," Luke asked.

Dipper just laughed and shook his head, "You will never leave me alone until you see it, will you?"

"No, sir!"