"We're picking up his energy signature, and it's on the move," said One-One Good while looking at the screen of the train.
"We need to move too then," said the Infinity Master.
"Can't help but feel bad about doing this," said the Guardian. Meanwhile, at the Mystery Shack in Gravity Falls.
"How have we not found a single mystery since we came back here?" asked Dipper as he and Mabel sat on the porch.
"Without Bill all of the craziness is just gone," said Mabel.
"But there has to be something around the corner, at least that's the feeling I keep getting," said Dipper. Suddenly three lights flashed before them from which Anne Boonchuy's group, Tulip Olsen's group, and Luz Noceda's groups appeared.
"Whoa, where are we?" asked Tulip.
"You are in Gravity Falls," said the Infinity Master as he and the Guardian stood on the roof of the shack.
"What's going on this time?" asked Anne.
"An evil god from another dimension is about to return to Earth," said the Guardian.
"And you all are the only ones who can stop him," said the Infinity Master.
"Wait, you're not talking about Bill Cipher are you?" asked Dipper who had ran off the porch along with Mabel in order to look up at the two godly creatures.
"That's exactly who it is, and he's not alone this time either," said the Guardian.
"Just who is this Bill Cipher, and why are we needed in order to fight him?" asked Luz.
"Bill's a psychotic demon from a different world who wants to destroy our reality and make it like his own," said Mabel.
"And you are needed because one of those he has on his side is Emperor Belos," said the Infinity Master.
"We can't get a break, can we?" asked Amity.
"The two of us can't stay here for much longer, but we will come back soon to fill you in more on what is happening and to give you some help," said the Guardian before he and the Infinity Master vanished.
"Guess for now we should move this inside so we can all talk," said Dipper as he turned to look at the other groups.