The male pines twin replayed what happened in his mind.

"Wake up, kid! Breakfast!" A muffled, tough voice yelled from downstairs. Dipper groaned, covering his head with a pillow. "Hey, get up bro!" A more feminine and cheerful voice yelled up. Dipper sighed and got out of bed. He looked around his room in the place called The Mystery Shack, or as he called home. He read his alarm clock on his bed stand right next to him. 10:32 AM was what it had read. He looked across from the room, revealing his twin sisters bed, which was quite the mess. Glitter, paper, knitting supplies, and stickers were scatter on top of it. Oh, and you can't forget her pet pig Waddles. The creature was snoring so loudly, he wondered how he could've possibly slept through it. The boy shrugged, and took another glance around the room. The mold on the ceiling was in its normal place, the closet door was squeaking, the dull sunlight was showing through the dirty window. But he wouldn't have it any other way. He jumped off of his bed and reached under for his vest and his clean(ish) clothes. He then proceeded to quickly get changed, grabbed his blue pine tree hat and put it on, along with some socks, and a watch just in case. He then started to descend downstairs.

"Hey, kid. Nice for you to finally get up." Dipper's great uncle, or 'grunkle',asked.
"Yo Dipster, have some breakfast. Grunkle Stan made eggs!" Dipper's female twin said, beckoning him over to the table.
"No thanks Mabel, I'm not hungry." He replied half-heartedly, as he took out a book, a journal to be specific. The Journal, to be exact. It was a mysterious book he had found buried in the beginning of the summer. It had information about the great mysteries of Gravity Falls, the supernatural town. Demons, incantations, sacred places, and musical creatures filled the book. And, everything was true for that small Oregon town. But truly the weirdest part? The author was Dippers great uncle, who also had happened to be a twin, and he lived under the house in a secret hidden basement.
His "Grunkle" Stan looked over to him and sighed. "Looking through my know-it-all brother's diary again?" Dipper grunted in response. "Come on, you're 12! You shouldn't spend every moment of your life with your nose stuffed in that book. Go outside. Hug a tree. I don't know kid." All he received was an empty stare from the twins. The man sighed and walked into the television room to watch TV.
"Fine, I'll do what he says." Dipper bluntly replied.
"You haven't even aten yet Dipper!" Mabel protested. He was already out the door.

Dipper sighed as he walked into the woods.
"Stupid.... Grunkle...... Old...." He grumbled to himself, only a few words readable.  As he finally got deeper into the forest, he took the book back out of the pocket inside of his vest. People said having pockets inside was idiotic and had to use, but he thought otherwise. They were 'cool' to him, but 'cool' to him would be a math exam. It's way off from other people's 'cool'. He flipped through the journal, stopping at a page which seemed even more mysterious then the rest. It had once had much writing about it, he could see that, but it was all scratched out. Only a few phrases were still visible, including a picture of the subject of the page, or the river, actually. Sure, a river shouldn't be interesting, but in this book? Anything and everything should be interesting. The boy reread the page for about the millionth time.
'This River is a harmful hing to anything and everything living. If you drink it or even touch it, you will-' It was scratched out at this point. Dipper squinted in confusion. He remembered the time he had questioned his great uncle about this page.

The boy opened the vending machine secret entrance, as he had memorized the opening after that eventful day with the government agents. He input the code to activate the elevator at the end of the stairs, and went to the bottom floor which had once included the portal. He got out and found his great uncle sketching something in the first Journal- he hadn't checked what.
"Great Uncle Ford?" Dipper cautiously asked. Stanford looked up and warily smiled at him.
"Yes Dipper? What brings you down here so late?" His uncle questioned back at him.
"Well, I've been studying this page for a few weeks.." He took out his journal and flipped to the page about the river. "What happened to this page, and why is it all scratched out?" He stated.
"Hmm..." His uncle squinted at the page and put a six-fingered hand on his chin, deep in thought. He looked quite confused. After about 15 seconds of him trying to think, he said surprised "I don't remember writing this at all."
That was a bit unsettling.
"A-are you sure?" Dipper pressed, getting more anxiety each second. "It has your handwriting, an-and your sketch style, but almost all of it i-is scratched out and-."
"Yes, I've noticed that." Ford said, once again trying to think and calm the boy down at the same time before he began to hyperventilate. "Could I borrow this book for the night? I'll return it in the morning, but I think it's time for you to get to sleep." He smiled down at the kid. Dipper calmed down and sleepily smiled back.
"Sure thing." Dipper yawned. "Goodnight great uncle Ford."
"Goodnight Dipper." Stanford said as his great nephew put the code into the elevator and went to the surface. He waved the whole time. As soon as he was out of sight. Ford grimly faced the page and sighed. "This is going to be a long night."

He never did manage to figure out what was with that page. As Dipper walked through the forest, he had wondered if he should check this stream out.
Dipper let his curiosity get the best of him, and started to travel to the rivers location.

"Hey, Grunkle Stan?" Back at the Mystery Shack, Mabel walked into the living room where Stanley was watching some boring black and white movies.
"What is it, sweetie?" Stan plainly said, eating some of his 'Stancakes'. "You're kinda standing in front of the TV."
"Do you-Y'know.. Do you think we were too hard on Dipper?" Mabel awkwardly replied, rubbing her arm. She was indeed blocking the television, on purpose.
"We barely even talked to him this morning."
"I-I know.. But sometimes we can come off as a teensy bit rude."
"What? That kid needs to come off as a teensy bit stronger, then."
There was silence.
"Why are you mean to Dipper?" Mabel broke the silence.
"Look, kid, I'm not mean to him, I just..." Stan thought it over for a second "I don't need to discuss my life decisions with my niece" He said mostly to himself. He groaned, and started to walk into the kitchen. "Here kid, put on some cartoons or whatever you kids like to watch these days." Stanley handed the remote to her, leaving Mabel in distress.

Dipper arrived at the location of the stream in the journal. He breathed in the nature-y scent of pinewood and flowers. He found a comfortable stump to lean against, and sat down there. He flipped to the next blank page in the journal and started to make another page on his findings about the stream. He didn't get too close, as it was a creepy but beautiful supernatural stream. He drew every pebble, grass strand, and fish in the water on the page. Needless to say he was here for a while. After a long while, he slowly got up and stretched. As he stood up, he wondered what he would do about the stream. 'Well, it's not close to the town, so that's a plus.' He considered. 'The water may not do too much harm. I guess I'll just leave it here, maybe ask help from Mabel or Ford.' The boy thought, and nodded at his decision. He picked up his journal, pencil, and hat to get ready to leave. But little did he know he was being watched.
Suddenly, he heard laughing come out of nowhere but up everywhere around his person. It started soft, then quickly raised to the volume of a screech. He covered his ears to stop the throbbing in his head. A flash of white and blue blinded Dipper, and a familiar triangle stepped out of that very light.
"Well well well!" The 2d creature said, floating around Dipper. "My, my, Pinetree, you've changed a lot! Actually, no you haven't." He teased, flicking Dippers nose with his small clammy hands.
"Not you again, Bill." Dipper spat out. He rubbed his temples with his hands, and continued. "What do you want now?" He angrily said to the triangle.
"Hmm...." The triangle put a hand on his nonexistent mouth, or where it would be, mocking a thinking pose. After a few seconds he replied. "Just to make your life miserable!" He laughed, and pushed Dipper towards the river. He caught Dipper right before he hit the water. "Easy there, wouldn't want things to get too interesting yet!" Bill cackled. Dipper grew angrier and angrier. He saw that stupid Doritos thinking he's completely harmless. It made him sick. Without thinking, he jumped onto the triangles' top, and shoved him into the water, submerging himself too. That didn't matter to him. All he wanted was a chance to aggravate Bill as much as he had to Dipper. Bill let out a screech, even louder then his laughing. Dipper ignored the sound and threw Bill out of the water. Dipper panted with anger while glaring daggers at the demon. Oh, if looks could kill. Bill floated up with his eye closed. He calmly wrung out his top hat. He opened his eye and even more calmly addressed the boy. "Oh man, you're going to regret that quite a bit." He cleared his throat. "Sweet dreams, kiddo." and with a single snap, made Dipper collapse into the water.

Dipper woke up on the riverbank, or stream bank if you will. It was around 5 in the afternoon, he checked on his watch which was surprisingly undamaged. He remembered it was waterproofed, and mentally face palmed himself. He also realized he had been gone for 7 hours.  He bolted up, noticing the immediate pain in his legs and face. 'Ugh... this is what happens when you try to investigate on your own.' He padded his vest, ensuring his journal was still there. 'That's surprising, considering the demon that had so wanted this book for whatever was going on in his triangular mind.' He angrily pondered to himself. He cringed as he scrambled to his feet, and stumbled towards the place he called home. While he was walking, he noticed the scenery around him. It actually looked more pretty then usual. The grass seemed more colorful then usual. The flowers seemed more lush and pretty.

It took him a while, but he finally tripped into the door. He fell flat on his face.
"Hey, you okay Bro?" Dipper opened his eyes to notice Mabel standing over him sounding worried.
"Oh, yeah, yeah." Dipper stammered back. He noticed her staring at him concerned. "Hey don't worry about me," He got a fake serious face. "worry about Waddles." He gestured to Mabel's pet pig in the other room, eating from her yarn collection that she used to make her sweaters with.
"Oh, he'll be fine." She said, in a funny voice. This made them both laugh. Mabel suddenly took in Dippers look. "Hey, are you sure you're okay?" She said, worry in her eyes.
"Wait, why, what's wrong?" He said, trying to check himself for any injuries.
"Your nose is bleeding, and your legs have black and blue marks on them.... Everywhere." She pointed out, pushing him into the bathroom which had a mirror. Dipper looked himself and noticed exactly what she had said.
"Oh man" he noted. His nose was leaking red liquid, and he looked down at his legs, which had black and blue marks running up and down. "Don't, uh, worry about me Mabel. I can fix myself u-"
"No, I'll help you!" Mabel got into his face. "We're twins, that's what we do, help each other." She took his hand and led him into the kitchen, where she sat him onto a chair. She put a tissue to his nose and wiped up a little bit of blood. She proceeded to wrap his legs in bandages and cool decorative band-aids, because every so often there were little scratches that had gotten there. She gave him a lollipop for 'being a good patient.' They then spent the time up until 10:30 PM watching Ducktective until Stanley got them both into their beds. After their goodnight rituals, they settled into their different beds and rested down to sleep. Mabel peacefully slept, while Dipper didn't have that much luck.