The episode begins with Principal Brown running through the halls of Elmore Junior High in a panic. He rushes into the teachers' lounge and warns the other teachers that the school superintendent is coming to Elmore Junior High. In the auditorium, the students and teachers listen to a speech given by the superintendent, a live-action human named Superintendent Evil, who declares his intention to eliminate the cartoonish and nonsensical elements of their school.
In class, Gumball and Darwin discuss Evil's modifications to their school, including Teri's face being blank and Alan being forced to have a body. Masami then bursts into the room as a cartoon human, telling Gumball and Darwin that they're next. Gumball and Darwin flee in horror, running into several of their classmates who have been turned into cartoon humans, including Tobias, Tina, and Sussie. The duo are backed into Evil's room, where he is using machines to transform Rocky and Juke into humans. Evil remarks that he is "fixing" them and that their transformation is nearly complete; Masami, who is inside a machine, slowly transforms as her cartoon eyes disappear to reveal live-action ones.
Gumball and Darwin flee by using their cartoonish logic to evade capture, but they then resolve to save their friends and reenter the school. They are able to return their classmates to their original forms using various zany antics, including singing with Banana Joe, goofing off with Sussie, and Gumball kissing Sarah (whom he mistook for Penny). With all of their friends and teachers restored, Gumball and Darwin are confronted by Evil, who initially prepares to fight them, but flees in fear. Banana Joe uses his banana peel to cause Evil to slip and fall at the end of the hallway.
The students and teachers approach Evil and find his face deformed; they pull off his mask, revealing to their shock that he is Rob in disguise. Rob attempts to justify his actions, warning them of an undisclosed event about to befall Elmore, and tells them that they can choose to either live in ignorance of what is about to happen or listen to him. However, before he can finish explaining, Tina uses her tail to knock him unconscious, and the show's distorted credits music play.
At night, Rob awakens in the school and angrily questions why the others didn't listen to him, saying that he was trying to save them and that transformation was their only hope of escaping to "the other place." At that moment, the ground suddenly begins to collapse, revealing the Void. Rob, horrified, holds on for his life, but loses his grip, remarking at the last second that "it's started." The floor disappears and Rob falls into the Void screaming; the screen freeze-frames on him as the credits' first notes play, ending the episode, and the series.
[Principal Brown runs in a panic through the halls of Elmore Junior High. He bursts into the library, where the Librarian is sitting at a desk.]
Nigel Brown: Is the library up to date with the district guidelines?!
Librarian: Let me check.
[The Librarian pulls out a telegraph key and begins sending a message in Morse code.]
Librarian: We should get an answer in a couple of weeks.
Nigel Brown: Gosh darn it! I'll just check myself.
[Principal Brown rushes over to the bookshelf and pulls out a book, reading it.]
Nigel Brown: Zoology... what the?! Are you telling me this is the latest edition?!
[Brown holds up the book to the Librarian's face. It shows an old-fashioned, medieval-style drawing of a lion, with a description written in Latin.]
Librarian: The monk should finish the new one by the end of the next Renaissance.
Nigel Brown: You have five minutes to find me some modern textbooks!
Librarian: Uh... okay.
[The Librarian picks up a large hourglass and turns it over. Principal Brown panics again and rushes out of the room to the cafeteria.]
Nigel Brown: The vegetarian option is less ham??
Rocky: Yeah, but to be honest, that was because we were running low on ham.
Nigel Brown: We're supposed to feed the kids five fruits and vegetables a day!
Rocky: Do mushrooms count?
Nigel Brown: Yes!
[Rocky begins to walk away.]
Nigel Brown: Where are you going??
Rocky: To scrape the walls of the locker room showers.
Nigel Brown: When I come back, I wanna see green everywhere!
[Principal Brown leaves. Rocky pulls out a spray can and sprays green paint on food. Principal Brown bursts into the teachers' lounge, where Miss Simian, Mr. Small, and Mr. Corneille are lounging. He begins sifting through papers.]
Nigel Brown: I should've done this before, but I need to check your work references - starting with you, Corneille.
[Mr. Corneille is in the middle of trying to exit through the window. He nervously looks back at Principal Brown. Principal Brown picks up his cell phone and begins a call.]
Woman: Elmore Penitentiary.
[Principal Brown hangs up and looks at Corneille in shock.]
Nigel Brown: You worked in a prison?
Moonchild Corneille: Well, I did eight years hard labor, which I guess is technically work...
[Principal Brown drops his papers and begins to cry, dropping his glasses on the floor.]
Lucy Simian: Pull yourself together, Nigel! You sound like a winded Chinese opera singer. What's wrong?
[Principal Brown stops crying, and picks up his glasses. His tone growns solemn and fearful.]
Nigel Brown: He's coming.
Lucy Simian: Who?
Nigel Brown: The school superintendent.
[Cut to the school auditorium. A live-action human is standing at the podium, with a name plate on it that reads "Superintendent Evil." He taps his fingers on the podium and stares out at the students and teachers in the room.]
Superintendent Evil: Elmore Junior High. My name is Superintendent Evil. Let me reassure you, I did not come to this school to break you and rebuild you from the bottom up.
[The students and teachers collectively sigh in relief.]
Superintendent Evil: I came to break you.
[The students and teachers gasp in fear.]
Superintendent Evil: This school, and its students, is in breach of every conceivable rule... including the rules of decency.
[Sussie, who is sloppily eating chicken legs, cries out sadly.]
Superintendent Evil: This is going to change. Any questions...
[Several students and teachers raise their hands.]
Superintendent Evil: ...regarding my authority will be severely punished.
[The students and teachers quickly withdraw their hands.]
Superintendent Evil: I am here to correct your outlandish behavior. Any questions...
[Several students and teachers raise their hands.]
Superintendent Evil: ...regarding my methods will also be severely punished.
[The students and teachers quickly withdraw their hands.]
Superintendent Evil: This school is diseased, and I'm the medicine. Any questions?
[Nobody speaks or moves.]
Superintendent Evil: Very good! Looking forward to working with you.
Following the New Rules
[The school bell rings. Cut to the hallway, where Gumball and Darwin are walking together.]
Darwin: Medicine? What kind of medicine is this guy?
Gumball: Not the kind you put in your mouth.
Darwin: [gasps] Do you realize what you get when you change the letters around in Superintendent Evil's name? [quietly] You get Superintendent Vile. Mm-hm.
Gumball: Dude, his name is literally evil.
Darwin: Hmm... e-vil... I guess. You gotta want it though.
Superintendent Evil: (off-screen) I said stand up straight, young man!
[Gumball and Darwin see Superintendent Evil lecturing Banana Joe.]
Superintendent Evil: Everybody knows the crescent is the shape of the slacker, the hammock, the despondent Frenchman's croissant, the moon that's too lazy to turn a man into a werewolf.
Banana Joe: But what do you want me to do?
Superintendent Evil: Stand up STRAIGHT!
[Banana Joe hesitates, then struggles to stand up straight. He eventually severs his body into several pieces in order to stand straight. Superintendent Evil smiles satisfactorily.]
Superintendent Evil: Better. Now detention. There's a dress code in this school, and bare midriffs are forbidden. And I'm counting four on you.
[Banana Joe winces sadly and walks away, struggling to maintain balance. Gumball and Darwin look on.]
Gumball: He is so mean...
Darwin: That's nothing. Because tattoos are forbidden, he made Teri erase her face.
Gumball: How is she holding up?
[The two look into the window of a room, seeing a faceless Teri with a hole punched ear.]
Darwin: Well, she tried to answer the phone but hole-punched her ear, and then got detention for having a piercing.
Gumball: Well, at least she finds comfort in feeding the science lab lizard...
[Teri is taking crumbs from slices of bread and dispersing them into a glass habitat with nothing but a large cucumber in it. She accidentally picks up Anton and pulls a piece of him out. He screams, and Gumball and Darwin wince and withdraw from the window.]
Gumball: And have you seen Simian lately? She's totally trying to get with Evil behind Principal Brown's back. I mean, if she's gonna have two faces, why do they both have to be so gross?
[They stumble upon Principal Brown and Miss Simian, with the former crying.]
Nigel Brown: What do you mean we can't see each other anymore?
Lucy Simian: I'm sorry, Nigel, it's just not professional for two members of staff to be in a relationship.
[Principal Brown cries and runs off. Miss Simian notices Superintendent Evil walking by, and her head turns 180 degrees, revealing one covered in makeup. She poses and looks at Evil, with one eye closed. He stops and turns toward her.]
Superintendent Evil: Simian, I'm cutting your pay in half.
Lucy Simian: What? Why?
Superintendent Evil: For being half asleep on the job. Your left eye is closed.
[Miss Simian opens her eye.]
Superintendent Evil: You've been a teacher here for 300,000 years, and your methods are still as slack as your... [observes Simian in disgust]... everything.
Gumball: [smirks] Oh, well, he's not all bad. I think that moment warrants an extra-special high five.
[Gumball and Darwin prepare to high-five, but Gumball stops short.]
Gumball: Hmm... definitely higher.
[Their hands extend through the windows and roof of the school and high up into outer space, where they slap together silently.]
Gumball: Forgot there's no sound in space.
[Superintendent Evil clears his throat. Gumball and Darwin notice Evil looking at their extended arms. They bring them back down, and they make a pile at their feet.]
Superintendent Evil: Watterson and Watter-adopted-son, detention!
Gumball: But we didn't break any rules!
Superintendent Evil: You broke the rules of nature!
Darwin: [points to Colin, who is walking by] That egghead is literally an egg!
Gumball: [notices William flying by] And William's a telekinetic flying eyeball! Everyone here breaks the rules of nature!
Superintendent Evil: Not for much longer. Listen to me, Elmore Junior High!
[Numerous other students and teachers of the school approach Evil.]
Superintendent Evil: I've had enough of your cartoonish conduct. From here on, any abnormal behavior is to be corrected.
[The bell rings.]
Superintendent Evil: Now get to class!
[William flies over to a door and begins to open it with his telekinesis.]
Superintendent Evil: No. The normal way.
[William turns back toward the door. Sad music plays as he attempts to open it using his body rather than his powers. The other students look on sadly as Evil stares unsympathetically. Finally, William is able to force the door open, and pushes himself through, at great pain to himself.]
Darwin: [tearfully] So brave...
Gumball: That's a broom closet, though.
[Bell rings. Cut to Gumball and Darwin in the classroom.]
Gumball: Can you believe him? I'm pretty sure there's laws against these laws!
Darwin: Well, I can't believe Carrie had to be buried if she wanted to attend class!
[Next to Darwin, Carrie's grave lies on her desk. She emerges from it.]
Carrie: And I can't believe they used manure instead of soil.
Gumball: We gotta do something!
Darwin: What can we do? He's got the whole school in the palm of that weird, fleshy pink thing on the end of his arm!
Alan: Whatever you do, do it fast.
[The camera pans to Alan, who has been tied into a humanoid shape.]
Alan: He forced me to have a body. My heart is in my mouth. Although... judging by the taste... it may be my lower intestine.
Gumball: He's right. We've gotta move fast. I mean, half the class is already in Evil's office getting "fixed".
Darwin: Fixed is a good thing, right?
Gumball: Tell that to a dog.
[The door of the room opens.]
Masami: Gumball... Darwin... [Masami is revealed to have transformed into a cartoon human girl. She hunches over, and stares at them.]you're next.
Gumball: Sure! Heh... we'll... be right with you.
From Cartoons to Humans
[Cut to Gumball and Darwin fleeing in horror through the hallways. They turn and crash into a tall human girl with a green coat.]
Gumball: Who are you??
Tina: I'm Tina.
[Gumball and Darwin scream in shock and run off. Darwin collides with a human boy in a rainbow shirt.]
Darwin: Who are you??
Tobias: I'm Tobias.
[Gumball and Darwin scream again and turn around, crashing immediately into another human girl.]
Gumball: Who are youuu....?
[Gumball's tone grows confused. He turns upside-down and stares at the girl.]
Gumball: ... Sussie?
Gumball: Okay, that's a massive improvement. But still!
[Gumball and Darwin scream again. Tina, Tobias, and Sussie surround them.]
Tobias: What's the hurry?
Tina: Join us.
Sussie: It's quite painless.
Tina: It's better this way.
Tina, Sussie and Tobias: It's better this way. It's better this way. It's better this way. It's better this way! It's better this-
[Gumball and Darwin spin around nervously and fall through a door. Superintendent Evil appears and looks down at them.]
Superintendent Evil: Trust me. This is in your best interest.
[Gumball and Darwin stand up, and look into the room, gasping. Rocky and Juke are hooked up to machines, with the human Masami in the middle in a chamber filled with water. The machines transform Juke and Rocky into cartoon humans like the others.]
Gumball: What are you doing to them...?
Superintendent Evil: Fixing them. And their transformation is almost complete.
[The skin on Masami's hand and eyes begins to peel away, revealing a live-action human form underneath. Her eyes open. Gumball and Darwin, mortified, run out of the room screaming.]
Superintendent Evil: BRING THEM TO ME!
[Tina, Tobias, and Sussie begin to chase Gumball and Darwin. Tina nearly catches Gumball, but he escapes by cartoonishly giving himself extra legs, allowing him to move faster. Darwin evades Tobias by jumping from locker to locker and sneaking behind him. Tobias catches Gumball by the tail, but Gumball loses his butt and tail in order to escape, rushing on without them. They run into another room and find a human Ocho defending the exit; they escape by sliding themselves out through an air vent into the parking lot. Ocho tries to follow them, but is unable to move through the air vent.]
Darwin: We gotta get out of here!
Gumball: No... we have to go back.
Darwin: You're right... we gotta fight them!
Gumball: No, I mean we have to go back because I left my butt in there. But yeah, that too.
Saving the School
[Cut to the school hallway. A human Banana Joe is patrolling while Evil speaks over the loudspeaker.]
Superintendent Evil: Track them down! They must not be allowed to escape!
[Joe spots Gumball and gasps.]
Gumball: Banana Joe.
[Joe stares down at Gumball's butt, which is on backwards.]
Gumball: Oh! Uh... [He hastily turns his butt back around.] What has he done to you, buddy? Remember who you are!
Banana Joe: Shh!
Banana Joe: No! No no no!
[Elsewhere, Evil turns his head, hearing Gumball's voice. Gumball continues to sing as Banana Joe winces and covers his head.]
[Gumball runs off. The first girl turns into Sarah and gasps in excitement. Gumball and Darwin continue to run through the hall. They come across another human and turn on a nearby water fountain.]
Darwin: Hey, Leslie!
[The water causes leaves to grow around the human, and he turns back into Leslie. Elsewhere, Mr. Small, Anton, Bobert, and Idaho are reverted from human into their normal forms.]
Mister Small: Yes!
Evil's Identity is Revealed
[Numerous students and teachers of the school gather excitedly, cheering. Suddenly, Superintendent Evil appears.]
Superintendent Evil: STOP THAT!
[The students and teachers gasp.]
Superintendent Evil: What do you think you're doing?
Gumball: Putting an end to your nonsense!
Superintendent Evil: We'll see about that. [cracks knuckles and raises fists]
Gumball: Fistfight? Really?
Nigel Brown: Take him down.
[Gumball raises his fists and they both stare at each other for a long time. Evil then unexpectedly turns tail and runs off. Banana Joe glares, removes his peel, and throws it, causing Evil to slip and fall at the end of the hallway. The students and teachers gather around him, and stare in confusion, as his head has become deformed and polygonal.]
Gumball: What the...?
[Gumball reaches down and pulls off Superintendent Evil's mask. The others gasp in shock.]
[Superintendent Evil is revealed to have been Rob in disguise.]
Banana Joe: But who's hiding behind this mask?
[Joe pulls on Rob's face, to no avail.]
Banana Joe: Oh no. Sorry, everyone. It is just Rob.
Gumball: Well, let's take him down to punch town!
Darwin: Yeah! Then we can kick his butt there!
Gumball: No, punch town is... is... never mind.
Rob: You fools!
[Rob stands up, and the others recoil.]
Rob: [worriedly] I did all this for a reason! Don't you understand what's going on in Elmore? You have two choices: live in ignorance about what's gonna happen here, or listen to what I have to say! It might just save your lives.
[The others stare silently at Rob.]
Rob: Okay, good. The reason I've been trying to transform you is bec-
[Before Rob can finish his sentence, Tina slams down her tail on him, smashing him into the floor repeatedly as he screams.]
Nigel Brown: [nervously] Uh, I think that's quite enough.
[Tina slams down her tail on Rob one more time. The show's end credits music plays, but they are distorted, and repeat.]
The End of Elmore
[Cut to the school building at night, where Rob is still lying in a crater. He wakes up abruptly, breathing heavily.]
Rob: [angrily] Ugh! [Rob stands up, throwing his mask of Superintendent Evil to the side.] Why did they stop me?! Transformation is the only chance they have of escaping to the other place when this world...
[Suddenly, the ground begins to shake. Rob looks around nervously, and loses his balance. The floor suddenly opens up beneath him, collapsing into the Void. Rob grasps the edge of the floor and struggles to hold on. He loses grip on one hand, and hangs on only by the other.]
[The edge of the floor disappears, and Rob falls into the Void, screaming and falling. The screen freeze-frames on him (mirroring Banana Barbara's painting from "The Future"), and the distorted credits music play again as the episode ends]