Marco: [as he runs to Star's room] Star! Star! Oh, Star! Are you ready to go kick some monster? [Star comes out of her room with a box, doing an acrobatic trick]
Star: Oh, boy, am I!
Marco: [Star glances at her box] Well, come on, Star! The Monster don't kick themselves.
Star: First, I have to put away my secret box.
Marco: Secret box? You never told me about your... secret box! [tries to peek in the box, but Star pulls it away]
Star: Hey, hands off, Peeping Marco! This here is my secret box! Besides, if I showed you what was inside, it wouldn't be a secret anymore. Duh! [opens the box, laughs at it, and shuts it as Marco tries to peek it] Oh, Marco… if only you could see what's inside my secret box, it would change your life! [Marco gets behind Star to see what's inside the box, but Star holds it to herself]
Marco: It's okay, Star, I know all about secrets.
Star: You do?
Marco: I've got a gazillion secrets!
Star: Like what?
Marco: Well, it's no secret that the best thing about a secret is secretly telling someone your secret, thereby secretly adding another secret to their secret collection of secrets. Secretly. [Star drools as the top of her head has lightning bolts coming out of it, showing that she couldn't understand the whole sentence]
Marco: You wanna hear one of my secrets?
Star: Do I?
Marco: Uhh... Let's see... [runs up to Star] Did you know that you're my best friend? [runs away]
Star: No... way. Oh, let's hear another one!
Marco: Okay. Uhh... Secretly... I'm a little bit naïve.
Star: Wow! I'll never look at you the same way again, Marco. Gosh. [Marco clears his throat and taps on Star's box] Tell me some more secrets!
Marco: Okay. I love my karate., I sleep with my shoes on, I've got an overdue library book,... [transition to Marco still telling secrets as Star lays her head on the box] ...I have a slight overbite. I've never been late for school, I've said the word "fancy" in conversation, I like to dance to loading zone announcements, I'm a little bit on the short side. And I'm wearing three pairs of underwear, right now.
Star: Gasp. I never would have guessed.
Marco: Now will you show me what's inside your secret box?
Star: No, Marco! It's for me to know and for you to never find out. You may be an open book, Marco, but I'm a bit more complicated than that. The inner machinations of my mind are an enigma. [imagines a carton of milk spilling itself]
Marco: Oh, yeah?! Well, I got plenty of secret stuff, too! Uh… [close-up of Marco's socks] I've got my secret socks on. [runs away and comes back with Laser Puppie's bowl] And my secret Laser's puppies bowl! [runs away then comes back, pushing his television] My secret TV! [turns on the TV] And my secret TV channel. [the TV shows an off-air color bars screen] What do you think of that, Star? Star?
Star: [giggles, then laughs loudly after a gander at the box and then stops to breathe. Then she looks again and laughs harder and wildly. Then she stops to breathe]Maybe if you saw what was inside, you'd know why it has to be secret. [shows the box to Marco] Inside this very box is the most secret-y secret of all of secret-dom and I am its sole witness! It's a heavy burden, Marco, but nobody must know the mystery of the box. [Marco tries to peek inside the box, but Star slams it shut]Nobody! Not even… Glossaryck's. [scene zooms out to show Glossaryck's looking down at Star and Marco, who notice this before it goes back to his spell book] It's a full-time job. I'm constantly on the alert. You never know when someone's gonna… [gasps when she finds out his box is gone. The scene cuts to Marco running with Star's secret box, but then he bumps into Star's] Marco, what do you think you're doing?! That's my secret box! Now, hand it over!
Marco: [struggles with Star on the box] But, Star, I must know the secret!
Star: [struggles with Star on the box] For the last time, Marco, no!
Marco: Come on, just a peek?
Star: Never! [Star and Marco strain as they fight over the box. Eventually, Marco's let go to Star secret box and she fall on the floor and he gasps] So, it's come to this. And to think that we joined the Best Friends Forever Club! [shows her finger with the ring on it and then the camera zooms in on the ring. She points it at Marco] Listen up, Marco SecretStealer Diaz! [as she pokes Marco's nose] If you ever come near my secret box again, we won't be friends anymore!
Marco: But... we're supposed to be... friends forever. Oh I feel so filthy! I have soiled our friendship garden! I just couldn't help myself! [jumps on Star] I know it's your secret! I promise to respect that! Oh, please forgive me, Star! Please!
Star: Well... I guess it's not all your fault. After all, this is a pretty great secret. I mean, how could you resist the greatest secret ever? [we see a close-up of Star's box] The most amazing... [as she sticks the box in Marco's eyes, the eyes pop out of him and then back in] mysterious... powerful secret in all Mewni. [his eyes are glued to the box for a moment, and then goes back to him]
Marco: So, what do you say, Star? Friends?
Star: Friends. [they shake hands. Cuts to a night view of Marco's room, then inside as Marco talks]
Marco: What could be in that box that Star doesn't want me to see? [slides down in his bed] Maybe Star's a master jewel thief and it's full of diamonds. [sits up] Or maybe Star's a deranged maniac who keeps his victims' severed heads in a box! [hides himself in the blanket and shivers] Or even worse... Maybe it's an embarrassing snapshot of me from the Christmas party! [screams.] I'm gonna find out what's in that secret box! I'm not gonna rest till I do! That's it! How do you look into a secret box? Secretly, of course; I'll just take the box while Star's sleeping, look inside, and before Star even has time to notice, I'll slide it back. Star won't know, and I'll have my own little secret!
Marco: [sneaks over to Star's room, puts on gloves and a ski mask, open her room door very slowly. He then he notices Star. He then screams gibberish, drools and Marco hides behind the portrait of Star and Marco. Marco then peeks and then the wall starts to crack. Star mumbles, the wall breaks even more and then the nail falls off. He then grabs the nail with his foot and puts it back.]
Star: [as the camera zooms in on the box] Seee... cret.
Marco: [thinking] I got to be more quiet. I don't want to wake Star up. [slides down the wall from the portrait and makes a loud noise upon touching the floor. Star stretches and then goes back to sleep. Marco then lifts his leg and then Star makes another noise. She then tosses herself over on the bed. Marco puts his leg down, which makes a loud noise]
Star: Duh... who's there? [mumbles then goes back to sleep.]
Marco: [talking to his foot] Shhh! [steps on a potato chip and makes a broken glass sound]
Star: Eh?! [gibberish] Who's that?! [Star is back asleep. Marco sweeps his sweat drops off him and they land, causing a loud splash sound.] Mmm... water. [licks her mouth dry, then tosses herself on the bed. Marco takes another step and makes an "Aooowga!" noise. He then steps again, making a loud machine gun noise. Steps again, making the sound of an elephant. He then stretches his leg near the side of the bed, which sounds like a speeding car, then takes the step, making the noise of a car crash. He then peeks above Star to see the box. He gets ready to reach for the box, but Star takes the box before Marco could grab it. He then slides onto Star, grabbing the box] Good old secret box. Let's see what's inside. [opens Marco's mouth and pulls out his tongue, then laughs and lets go of his tongue]Nighty-night, boxie. [puts Marco on the side of the bed. Marco gets off the bed and then trips on a shoestring, causing him to bounce around Star's room, making a lot of loud noises until his head hits the wall, causing the portrait to fall off the wall, hitting him in the head, breaking the portrait in half. The box then lands on Marco and makes a loud noise. The scene cuts back to Star, who, despite all the noise, continues to sleep]
Marco: Gee, Star sure is a heavy sleeper. [Star wakes up]
Star: Huh? Who said that?! Who's there?!
Marco: Uh…
Star: It's the Burglar! And he's stealing my secret box! [runs up to Marco] Hand over the goods, Secret Box Bandit, and prepare for the most unpleasant pillow fight of your life! [readies her pillow like a shotgun, ready to attack him]
Marco: Wait, wait, wait, Star! Stop! [takes off his mask] It's me, Marco!
Star: [stares at him while clueless] Nice try, burglar, but Marco's my best friend, and he'd never steal from me.
Marco: No, really, Star! Look! [Star gasps. Marco presses a button on the ring]
Star and Marco BFF Ring: It's the Best Friends Forever, Best Friends Forever Ring!
Star: Our friendship ring! It is you! [crying as she covers her face with his pillow]How could you do this?!
Marco: If it makes you feel any better, I haven't looked inside. [throws the pillow away and snatches the box out of Marco's hands]
Star: [with a tear coming out of her eye] That's it, Marco! You have crossed the line. As of right now, this friendship is over!
Marco: [gasps and tears up] Really?
Star: Nah, you can look inside it if you really want to.
Marco: Okay! Oh, this is one of the most exciting moments of my life! Well, here it goes! [he lifts the lid off the box] Huh?
Star: Well, didn't I tell ya? [we see a string inside the box] Isn't it great?
Marco: It's just a string.
Star: A secret string!
Marco: Boy, when you're right, you're right! That's some secret box you've got there! Yeah! Thanks for showing me that. [puts the lid back on the box] Well, good night, Star. See you tomorrow.
Star: Good night, Marco! [Marco leave Star's room and close her door]
Marco: I should've known! It was just a piece of string all along! Wait 'till I tell Ferguson, and Alfonzo!
Star: [laughs menacingly] Good thing he didn't pull the secret string, opening the... [a secret compartment opens] ...secret compartment of my secret box... [takes out a photo] ...revealing one embarrassing snapshot of Marco at that Christmas Party! [cut to the Diaz house] Merry Christmas, Marco! [laughs as the screen fades to black, ending the story]
