[Gravity Falls]
[At the Mystery Shack]
[7:45 pm]

Grace:*Dressed up as a bloodlust surgeon* *Helping Stan with the decorations*

Stan: Careful with the jack-o-melons, they costed a lot. Try not to eat all the candy Soos.

Dipper & Mabel:*Dressed up as Ghostbusters*

Grace: Cool costumes guys.

Mabel: Thanks! I made the costumes myself and Dipper helped out.

Dipper: I got burnt by hot glue.

Waddles:*Snorts and walks in front of Mabel* *Dressed up as a ghost*

Grace: Aww cute.

Mabel: Oh yeah, I dressed Waddles up as Slimer.

Bill:*Teleports next to Grace* *Dressed up as a Mafia boss* Yellow!

Grace: Oh, you're early to the party Dorito boss.

Bill: Just call me your boss~

Grace: Yeah, no. My sisters should be here at any given time.

Mabel: Oooh I can't wait to meet your sisters. Wonder what they're dressing up as?

Lace: Hello! *High up in the sky flying on a broomstick* *Dressed up as Mercy's witch skin*

Mabel:*Looks up* Hi there! You must be one of Grace's sisters.

Lace:*Flies down* Indeed I am. My name is Lace Falls.

Mabel: Mabel Pines. I love your costume.

Lace: Thank you. I crafted it myself.

Mabel: That's awesome.

*Suddenly something underground grabs Dipper by his ankles*

Dipper: Oh my gosh! *Jumps and runs off in fear*

Trace: Ha ha ha! *Digs herself up* Got ya little man. *Dressed up as a zombie*

Dipper: Oh heh heh you got me all right.

Mabel: Hello, I'm Mabel! I like stickers and sweaters. I got a pet pig named Waddles. What's your name?

Trace: Trace Falls.

Stan: That's a lot of you. Are you three..?

Grace: We're triplets Stan.

Stan: Oh.

Trace:*Digs herself out* Time for some fun.

[Time Skip to the party]
[8:39 pm]

*Everybody at the party having fun*

Lace:*Dancing until she accidentally bumps into someone* Sorry.

???: I-It's alright.

Lace: Will?

Will:*Dressed up as Oni Genji* *Takes off his mask* Hi Lace.

Lace: You came, and you're wearing the costume. But how did you...?

Will: Master a-and Mistress were oddly kind e-enough to let me go just for t-t-tonight.

Lace: I'm suspecting they're plotting something.

Will: M-Maybe.

Lace: Yeah. More importantly, you're here. Let's get some punch.

[Another Time Skip]
[9:59 pm]

Trace:*Scares some children* Haha! Love this holiday.

???: You seem to have fun.

Trace: Squarehead? You're here.

Tad:*Dressed up as Sherlock Holmes* Indeed I am Miss. Falls.

Trace: Thought you're not coming.

Tad: Everyone back in Monster Falls are okay and there's no monsters attacking them, yet.

Trace: Thanks for informing me Sherlock.

*Then screaming broke out*

Trace: Too soon.

Soos: Big monster, dude!

Bill, Will & Tad: A Hater?!

Grace:*Pulls out her sword* I got this! *Charges at the monster*

Lace:*Pulls out her sword* *Chops its arm off*

Wendy:*Recording the whole fight* This is going viral.

Trace:*Pulls out her chain and yanks the monster to fall down*

Grace:*Got some monster flesh on her face* Wait. *Tastes the flesh* Is this candy?

Lace: Candy?

Trace:*Takes a bite* I taste candy corn.

Dipper: That's impossible. The Summerween tricker can't come back, it was devoured by Soos years ago.

Ford: Hello everyone, like my improved piñata?

Grace: Ford? You made that thing?

Ford: I thought I'd bring up the spirits of this holiday in Gravity Falls.

Trace: You sure did Pines.

Ford: Pardon but who is she?

Grace: My sister.

Lace: And I'm her other sister.

Ford: Triplets?

Lace: Yes, we are.

Ford: My golly.

[And another Time Skip]
[10:25 pm]

Mabel: Group picture everyone!

*Everybody gathers up*

Mabel: Say something stupid.

Everybody: Something stupid!

Mabel:*Snaps a picture* Now the Triplets!

Grace, Lace & Trace:*Strikes a pose next to Bill, Will(Who puts his mask back on & Tad(Pulls his cap down so he won't be recognized)

Mabel:*Snaps another picture*

Bill: You're gonna ask me why I came.

Grace: I was until you read my mind.

Bill: I just thought I try it out.

Grace: You sure? I thought human holidays are a waste of time in your opinion.

Bill: Well...

Grace: I can read minds too.

Bill: Don't try!

Mabel:*Spies on the two dream demons* I smell romance~