Bill watched Dipper in shock. It was bad, real bad. They got no time to even guess what Mabels ans Stans plan was… But do they have to guess?
"Dipper. What exactly was in your dream?" the demon asked instantly when idea hit him.
"A bit older Mabel and Stan, they were arguing with Ford, all dressed in really fancy clothes and the Rift, it was open..." Dipper said. "But I'm not sure what opened it, and first there were Mabel and Stan aka. Shermy entering the shack..."
"That's it. They want to open the rift. And possibly merge it with our collapsed dimension to restore it. Why haven't I thought about it earlier!" Bill was furious with himself.
"But why would they come now?" Dipper asked, "Why not during weirdmageddon? Not after it?" he continued.
"Weirdmageddon never left Gravity Falls, my guess is they didn't even notice it happening" Bill shrugged while looking for his phone, no work when the end of the world is coming. "Or it was supposed to just happen without them doing a thing. But then, in both cases, why hadn't Ford done a thing?" he wondered finally finding the damn thing.
Dipper let him do the call. He perfectly knew what Ford had to do with it – Time Baby, reason why Bills dimension collapsed. Stanford Pines was the one who 'created' it and the director of time police.
"Now we need a plan. A good one." Bill hummed hiding his phone. He got three days off, not much but it had to be enough.
"Any ideas?" brunette asked going to their bedroom. He wasn't going to fight anyone in one of Bills T-shirts and underwear.
"We can cross out contacting Ford. I'm sure he's pissed that I disintegrated Time Baby not to mention me actually existing in a way I do." Bill hummed openly watching Dippers' butt. "We're alone with this one." he added turning around after getting a heated glare from Dipper.
"I have a way to close it permanently," Dipper confessed "But I'm not 100% sure it'll work." he added finishing with dressing up.
Bill sighed. "It's certainly worth a try." he said following Dipper ho his car.
Despite weather forecast saying it'll be sunny whole week, dark heavy ominous clouds covered whole sky. "What the..." Dipper muttered seeing it. It wasn't normal for forecasts to be this wrong…
"Mabel" Bill said calmly opening the car. "She does that to the weather." he added taking the passenger seat.
"You're really calm considering situation we're in." Dipper noted as they drove to highest 'cliffs' in the area, if you can call those mountains cliffs.
"My sister might be an ass-hole but she isn't dangerous by herself. I'd be more concerned with Ford but I doubt he'll even bother with this dimension for a while."
Rest of the drive passed in silence, Dipper focusing on the thought of finally closing the rift and Bill wondering if he was really right about his twins and grandfathers plan.
"You okay?" Bill asked when they stopped. Dipper was really pale, a bit green in the face even.
"Perfectly, I'm only about to save the world." Dipper sarcastically grumbled walking closer to the edge, "I just don't like heights, third loop." he explained.
Bill laughed at this. They both knew it was fake so neither said a thing. Instead they both looked at the clouded sky, question waiting to be asked. "So what's the plan?" Bill said it after a couple of seconds moving his eyes to Dipper.
"The Rift is a rip between this dimension and Mindscape, witch connects multiple dimensions, but not all of them, there are multiple… but that isn't important." Dipper rambled taking out a small green notebook. "Whole reality as we see it can be described using more ore less complicated ciphers depending on how complicated the thing you describe is." he continued while looking for something in his notebook. Bill was silent completely understanding it, he read Dippers' inter-dimensional physics books. His model of dimensional structure was quite fascinating.
If this, physical dimension is a square then there are many of those next to each other unable to communicate.
Then there is the mindscape, irregular in shape, overlapping many squares and other mindscapes creating connections.
And above this is the Truth. Universe as it really is, part of 'space' both humans and demons can't enter no mater what they would do.
And it all can be divided into multiple clusters, each having a different start and containing all possible continuations and decisions coming from that one start.
And if it isn't funny enough, clusters can overlap. But it's rare, and Bill doubts Dipper knows about clusters.
"So you have a formula that will sew that rip in the inter-dimensional blanket separating this dimension with mindscape?" Bill asked to confirm his thought. He was still wondering if Dipper knows about the Truth, and the connection he has with it.
"At least I believe I do." Dipper said.
Bill blinked, not perfectly sure of his success he was still willing to try? He laughed. It was crazy even for him. But for some reason he believed that it'll work. "Let's do it then." he gasped somehow calming down after five minute laughing fit.
Dipper rolled his eyes, he will never understand Bill. "Let's" he said. "just stand back." he instructed as demon was about to ask if he needs any help. "But be ready if something tries coming trough. We'll need to open it first." he added.
This was more like Bill, although he wasn't too fond of opening it if there was chance of failure. Watching Dipper chant and sky slowly rip apart, Bill wondered what was worse, his sister or whatever will get attracted by the Rip.