(Opening scene: Cut to Professor Utonium and the girls walking to school)
Narrator: Aww, It's the first day of school, But what's this? Pokey Oaks Kindergarten is closed? (Bird cries)
Blossom: What happened?
Buttercup: Don't you remember?
(Flashback to Bubbles in her 1998 counterpart design)
Bubbles: For my spring break, I fought a giant space crab on a radioactive comet with my sisters. I found this goo after he exploded. (She accidentally throws the beaker) Oops.
(The beaker lands on the hamster named Pee Wee and Pee Wee starts to grow big and the entire class runs out of school)
(Back at the present moment)
Bubbles: Oh, yeah. (She waves hi to Pee Wee) Hi, Pee Wee!
Pee Wee: (Roars saying "Hi, Bubbles!")
Blossom: Where are we gonna go to school now?
Professor Utonium: This new bigger, better school. (Cut to the prison school. A wolf howling is heard as the thunder crashes. Blossom and Bubbles scream)
Blossom: We're going to prison!?
Buttercup: Sweet.
Professor Utonium: No, no, no girls, next to the prison. (Cut to a new High School)
Bubbles: Wait. You mean we'll be going to school with the...big kids?!
Professor Utonium: Yep. But, that's okay. It's all part of...(He starts to cry) of...(Hugs the girls) Oh! You're growing up so fast! (Walks away) Have a great day, kids.
(The girls are about to enter the school)
Blossom: Don't worry, girls. It's just a new school. I'm sure we'll fit right in. (The girls open the door and we see high school kids that are bullying, texting and talking)
Blossom: Well, this isn't too bad. (The school bell rings as the kids rush over to class, crushing the girls)
Buttercup: This is the worst. (We see two boys and one girl laughing as Blossom walks to them)
Blossom: Hey. Hi, I'm Blossom.
Blonde Girl: (Imitating Blossom) Hi, I'm Blossom.
Blossom: That's not what I sound like.
Redhead Boy: You sound like a baby.
Kids: Baby voice! Baby voice!
(We see Bubbles washing her hands in the bathroom as 3 teenage girls come by her)
Teen Girl 1: Hey, who did your hair? Your daddy?
Bubbles: Yeah. Yes he does. (The teen girls roll their eyes)
Teen Girl 3: It looks like baby hair. (The teen girls laugh)
Teen Girls: Baby hair, baby hair, baby hair!
(We see Buttercup in the hockey dress-up room while she ties her shoes as a pimple girl comes by)
Pimple Girl: What is up with your skin? It's not cool like mine. (We see the pimples on her face and a girl screaming is heard)
Buttercup: Yeesh.
Pimple Girl: Baby face-
Students: Baby, baby, baby! (We see the girls' heads spinning around looking sad. At home, the girls were in their bed)
Girls: We're not babies!
Professor Utonium: Now, girls, It's just the first day.
Girls: Make us older!
Professor Utonium: I'm sure you'll fit in no ti...
Girls: Older!
Professor Utonium: It's too danger...
Girls: Older! Older! Older! OLDER! (sweetly) Pl-e-e-e-e-e-ease?
Professor Utonium: (Closes the book and sighs)
(Cut to Professor Utonium adding ingredients to make the girls older)
Narrator: Fiber, Prunes, and Everything Mild. These were the ingredients chosen to make the perfect little girls slightly older. But, Professor Utonium did everything correctly and they were no accidents. The whole day went smoothly. Pretty anti-climactic if you ask me. (He brings the antidote to the girls)
Professor Utonium: Now, girls, only one teaspoon for each of you. Otherwise, the ramifications of this could be dangerous.
Girls: We know. (They take a sip)
Professor Utonium: Good night, girls. (Turns off lights)
Girls: (from o.s) Good night, Professor. (The girls go to sleep and suddenly wakes up with their eyes)
Bubbles: Do you think it's working?
Blossom: Maybe we need to wait a little.
Buttercup: Waiting is for babies! We need more of that magic juice.
Bubbles: (Singing as the girls tiptoe past the Professor's room) Dun dun dun dun duuun, we are sneaking!
Blossom: Bubbles!
Bubbles: Sorry! (The girls get three antidotes at the table) Are you sure we should be doing this?
Blossom: Maybe we could try talking to the other kids...(Buttercup starts sipping the antidote and burps) Or we could just drink the formula and see what happens.
Blossom, Bubbles: Cheers. (They drink the antidote. The next morning Blossom wakes up and puts on her slippers and goes to the bathroom and looks in the mirror and she now has grey hair with her red wrinkly bow and wears blouses)
Blossom: (Old voice) Ahh! I'm old! (Bubbles and Buttercup come in with wrinkly faces and wearing blouses, too)
Bubbles, Buttercup: (Old voice) We're all old!
Old Bubbles: Maybe the Professor won't notice. (Cut to the old girls having breakfast with Professor Utonium)
Professor Utonium: Of course I noticed. And I'm very disappointed.
Old Buttercup: You disappointed?! (Her teeth fall off) My teeth won't even stay in!
Old Bubbles: Wha? Speak up. I can’t hear you.
Old Blossom: (Sleeping due to being old, but then farts and wakes up) Who are you people? (She goes back to sleep)
Old Bubbles: Professor, you gotta make us young again.
Professor Utonium: I'll work on an antidote while you’re at school.
Old Girls: School?
Professor Utonium: You don’t wanna ruin your perfect attendance on the second day.
(The next scene shows the three elderly Powerpuffs in the school hallway.)
Old Blossom: Well now that we're old, at least we'll get some respect.
(The school bell rings and once again, the girls get run over by the kids despite their elderly forms)
Old Buttercup: I take it back, this is officially the worst.
(The next scene shows the elderly Bubbles knitting.)
Raven Haired Girl: Whatcha knitting? Booties for your grandkids? (Laughs)
Old Bubbles: (Reveals a blue woolly hat that she knitted) No. It’s a caboodle for your noodle, my child.
Raven Haired Girl: (Wears it) Totes sweet!
Students: Us next!
(We then see the elderly Blossom walking down the school hallway when Big Joey and a brown haired boy get in her way.)
Big Joey: Give us your lunch money, old lady.
Old Blossom: I don’t have any money, but I have some hard candy. (Takes out an orange candy piece from a paper bag)
Big Joey: (Scoffs) We don’t want hard candy, Grandma.
Old Blossom: I understand. This candy is probably too hard for you anyway.
Big Joey: What are you saying? (Takes the candy) Big Joey here can’t handle your little bit of candy? (Eats it) Hey, this ain't totally terrible. Can we have some more? (More kids come by)
Kids: Us too!
(The next scene shows a history class where the elderly Buttercup is at. The teacher shows the class a map of the U.S.)
Male History Teacher: And that is how Christopher Columbus discovered America.
Students: (Bored) Boring.
Old Buttercup: Christopher Columbus didn’t discover America. It was the vikings. I should know. I was on Leif Erikson’s boat. (Time-lapse to where the senior Buttercup is standing on her desk, about to conclude her story.) So, that’s how we defeated Dracula and the Shark People and discovered Salt Lake City.
(The entire class cheers after hearing the story, then cut to the Professor, who is in the lab making the antidote for the girls.)
Professor Utonium: Hmm, I think I may have figured out the antidote. (He puts a drop of it in the beaker, which makes a huge hairy monster come out of it. The monster roars at the Professor.) Or maybe not.
(Cut back to the school where the students and the elderly girls are walking out the building, about to go home.)
Raven Haired Girl: (To Bubbles) Thank you for the hat.
Big Joey: (To Blossom) Thank you for the hard candy.
Teal-Dress Girl: Great stories, granny Buttercup.
Old Buttercup: All right. Tomorrow, I’ll tell you about the battle with the plutonians. (She air punches, causing her teeth to fall off again.) Darn these dentures. (The pimple girl picks them up.)
Pimple Girl: Here, grandma Buttercup. I also got you some denture cream, same as my nana. Stronger than mega glue. (She gives the old Buttercup the denture cream)
Old Buttercup: (Squirts the cream on her dentures and puts them back in her mouth.) Thanks, sport! (Walks to her elderly sisters) Who knew being super old would get us so much street cred?
Old Blossom: Still, what I wouldn’t give to have one more stab at youth again. (They all sigh)
(Cut to Mojo Jojo walking his dog while talking to his mom on the phone.)
Mojo: Nothing, Mom. Just walking the dog. Or should I say he is walking Mojo. (Laughs) What’s that? Uh, yeah. Of course I’m getting you a birthday present. Hmm? (Gasping) Powerpuff Girls!
Old Girls: Mojo!
Mojo: You are wrinkly old ladies!
Old Bubbles: Are you sure that's Mojo? (Creak) Looks like a cactus or something.
Mojo: Yes, it is Mojo! The hat, The evil laugh Ha, Ha, Ha! The winning smile. (Ting)
(Animation goof: The dog's leash disappears when Mojo says "The evil laugh".)
Old Bubbles: Oh, hi, Mojo.
Mojo: You're so old and wrinkly, you will never again interfere with my genius master plans! (Laughs evilly)
Professor Utonium: (Singing) Miss Suzy had a steamboat, the steamboat had a bell. Ding Ding!
Mojo: You can't stop me with your silly old lady tricks! I am Mojo Jo--
Big Joey: Hey! Are you picking on our grannies?
Mojo: Uh-oh. (Students yelling and fighting sounds are heard from the left offscreen)
Old Blossom: Now that's what I call an old-fashioned whuppin'.
Professor Utonium: Hey, girls, I got the antidote.
(The scene transitions to the senior girls on the bench, holding their beakers of the antidote.)
Old Blossom: Wow, those kids really respected us. I think I’m gonna miss being old.
Old Bubbles: Me too. And I think I speak for all of us when I say... (The old Buttercup drinks the antidote and burps)
Old Buttercup: Excuse me, ladies. (Zooms upwards)
Old Blossom, Old Bubbles: Cheers. (They drink the antidote and also zoom upwards. The girls are now officially young again.)
Blossom: We're really sorry professor. We shouldn't have been in such a rush to grow up.
Professor Utonium: Oh, girls, I never want you to grow up.
Monster: (Hugging the Professor and the girls) Mm. This is nice.