Dipper and Mabel got off the bus and ran over to the Mystery Shack.  They missed it so much.  Just then Ford came out.

"Dipper, Mabel!"  Ford said and gave them a hug.

"Ford we missed you so much."  Dipper said.

"I missed you guys too."  Ford said.  "So I guess you guys got my letter."

"Yes so what's the problem?"  Dipper said.

"Come down to the lab."  Ford said.  Mabel, and Dipper followed Ford down to the lab below the Shack.  Ford lead them over to a radar.

"Look at this."  Ford said and pointed to all of the red dots on the radar.

"What are those red dots?"  Mabel asked.

"This a radar of the entire world, and all of the red dots are the places where Bill has striked."

"Ok but in your letter you said that he was working with someone."  Dipper said.

"I found out where Bill and whoever he's working with hideout."  Ford said.  "They have a huge lab and computers and I think they are making a portal back to Bills dimension, so they can unleash the weirdest of his dimension, but not just on Gravity Falls...The whole world."

"Oh wow."  Mabel said.  "That's bad." 

"But let's worry about this tomorrow.  You guys have had a long bus ride."  Ford said and they all walked back upstairs.  When they got back up stairs, they saw Soos fixing a window and Stan talking to Wendy.

"Hey guys."  Wendy said and walked over to the twins.

"Hey Wendy."  Dipper said.

"How you guys doing?"  Wendy said.  "Heard you guys are going into Senior year next year."

"Yes!!  And you were wrong last time I was here.  High school is awesome!  For junior year I was prom queen!!"  Mabel said.

"Good job."  Wendy said.  "How are you doin Dipper?" 

"I'm doing great."  Dipper said.  He could feel his cheeks getting red.  He might have still had a crush on her.

"That's good."  Wendy said.  Just then Candy and Grenda walked through the door.  Mabel screamed and ran over too her friends.  They all got in a group hug.  They talked and talked for hours.  It was soon 10:00 at night.  Wendy, Soos, Candy and Grenda went back home.  Dipper and Mabel went up to the attic.

"Dipper, it's just like we left it!"  Mabel said and jumped on her bed.

"Yeah, and I really missed it."  Dipper said.