Gumball and Darwin are seen somehow locked in the bathroom together. Believing they will be spending the rest of their lives there, Gumball tells Darwin a secret he has been keeping for a while - he was the one who had drawn a creepy picture in Darwin's schoolbook, causing Darwin to receive a counseling session over the summer. After a moment of anger, Darwin starts to tell Gumball of a secret that he has been keeping. Before he can say what it is, Rocky opens the door and lets them out, explaining that he thought they were the ghosts of school girls haunting the bathroom. Gumball and Darwin cheer at their liberation, but as they walk away, Gumball becomes curious as to what Darwin's secret is, but Darwin refuses to tell.
When they get home, they play the fighting video game. Gumball asks again for the secret, but Darwin still will not tell. Gumball, becoming more and more frustrated over Darwin's secret, begins mashing buttons really quickly out of anger. He beats Darwin's character violently and repeatedly smashing it to mush with a big, wooden hammer as Darwin looks on in shock.
Later, Gumball prepares a meal for Darwin. Darwin warily eats it, believing it to be a ploy by Gumball to get his secret. He is right - Gumball made the food extremely spicy, and ensured that all thirst quenching liquids inaccessible to Darwin, except for one glass of milk that Gumball uses to taunt him. Darwin chases after Gumball, desperately trying to grab the glass of milk, but Gumball simply and gracefully dodges his dives. Eventually, he is reduced to crawling. Right when he gets into grabbing range, Gumball sets it further, and Darwin finally passes out, a flame protruding from his mouth. Gumball, feeling guilty, douses the flame with the milk, and Darwin jumps up and thanks him, much to Gumball's chagrin.
Gumball's next plan is to pretend to be a recorded message for Darwin. Using a pay phone, he calls the house. Richard answers the phone, and summons Darwin when he learns the message is for him. Gumball convinces Darwin that he has won a prize, but to claim it, he needs to tell his secret. The prize is vouchers for a beauty spa. While Richard is ecstatic, Darwin is not pleased. At this point, Gumball's phone time is almost up, and he has run out of quarters. He tells Darwin to hurry up. Darwin begins to ask for more spa details, but Gumball interrupts him with a loud "GIVE ME THE ANSWER!" Right before Darwin tells him the secret, his phone time runs out, causing Gumball to rage.
Gumball then tries reading Darwin's mind to figure out his secret. By doing so, he tries to focus on Darwin who is drawing a picture. When Gumball's face stretches all the way toward Darwin, Darwin wonders if Gumball is trying to read his mind. Gumball asks if Darwin was thinking that Gumball's face hurts from his attempt. Darwin says he is not, and Gumball decides he was not reading his mind and lets his face relax after a sad attempt with his face giving out after that.
That night, Darwin dreams about himself swimming in the ocean. He hears a crying shrimp, and goes to him, asking him if he is all right. The shrimp claims he is sad because his friend will not tell him his secret. Darwin tells him that even best friends have secrets. The shrimp asks Darwin if he has a secret, and if he does, he should tell him, so he would feel better. Darwin refuses, but the shrimp just begs him to. The dream then becomes a nightmare, as all the sea creatures (including a catfish, who lives in fresh water) come out, and ask Darwin for his secret. Darwin wakes up, only to reveal Gumball trying to get Darwin to tell him his secret. When Gumball finds Darwin awake, he pretends to rub Darwin's fishbowl to help him sleep.
The next morning Anais claims to know Darwin's secret, and Gumball persists to get it out of her by poking at her head all day and on the bus ride to school. Anais threatens Gumball not to poke her again, but he does it anyway, causing him to get beat up. At school, Gumball acts as if he knows the secret to cleverly get it out of Darwin, however, Darwin says he would only tell the secret in a life or death situation.
Gumball locks himself and Darwin in the boys' bathroom to get the secret out of him. Darwin says that the secret was the sandwich Gumball made for him was not great, it was only good. Shocked and angered, Gumball throws a fit at Darwin, since he expected the secret to be something less trivial. The only way out of the bathroom was through the sewers, which Gumball obviously did not approve of. Soon enough, after minutes of swimming through sewage, arguing over the whole buildup to the secret, and ending up as a bottle of water at the water purification plant, Gumball and Darwin get home, coming up from the toilet in the bathroom, scaring Richard who was washing his hands and wonders if he ate them. They say he did not and they were just trapped in the sewers, relieving Richard.
Darwin leaves the bathroom, letting Gumball take a shower, Anais asks Darwin if he told the real secret. Darwin says that they can never let Gumball know of the video they uploaded. The video is Gumball doing a hip hop dance and failing miserably as he destroys his whole room in the process. It is shown to be a major hit as evidenced by the high amount of views it has received.
The skateboarding scene from "The Pressure" appears as one of the related videos on the streaming site, along with a video from Mr. Small about "Small Kwon Do" and the awesome brick break from "The Gi."
[The scene starts out showing the door of the boys' bathroom. Gumball and Darwin are yelling for help and banging on the door]
Darwin: We can't get out!
Gumball: Please, help! We're locked in!
Darwin: Please, let us out!
[Gumball stops yelling and sighs]
Gumball: It's no use, Darwin. We're gonna be stuck in here forever.
[Both slide down the wall to a sitting position]
Gumball: [Annoyed] It's the last time I come in here to whistle for you.
Darwin: But if you don't whistle, I can't go!
Gumball: [Sighs] I never thought it would end like this. Stuck in a bathroom forever.
Darwin: At least we've had some pretty good times.
Gumball: And some crummy ones too.
Gumball: Look, Darwin, if we don't get out of here, there's something I need to tell you. [Inhales] Remember that time I found a creepy picture in your schoolbook and you said you didn't do it?
[Flashback of saddened Darwin in a classroom with Miss Simian and Mr. Small looking at Darwin's book amazed, before looking at Darwin, then back to the book]
Gumball: Well... That was me.
Darwin: [Outraged] What?! I had to go to counseling for that! I lost my whole summer!
Gumball: I'm sorry, dude.
Darwin: Mr. Small put me in the isolation tank!
Gumball: Well, let's not dwell on the past.
[Darwin shakes his head in annoyance, before suddenly becoming wide eyed]
Darwin: Gumball, there's something I haven't told you too, and it's probably gonna shock you.
Gumball: What? Is it really bad or something?
Darwin: It's pretty bad, yeah. Last week—
[Rocky opens the door, interrupting Darwin]
Rocky: Oh, man, I'm so glad it's you! I thought this place was haunted by a couple of screaming girls!
Gumball and Darwin: [Run around] We're saved!
Gumball: How long have we been here?
Rocky: About three minutes.
[Gumball and Darwin exit the bathroom]
Gumball: Oh, uh, wait, what were you going to say back there, by the way?
Gumball: You were going to say something, remember?
Darwin: Ohh, don't worry about that now. We're free!
[Gumball looks worried and stops walking]
That Little Secret
[The living room. Gumball and Darwin are playing Kebab Fighter against each other]
Darwin: I love this game, it's so much fun!
Gumball: Yep! [brief silence] Hey, you know what else was fun? When we were stuck in the bathroom together and you were gonna tell me that secret!
Darwin: Yeah, that was fun.
Gumball: Just out of curiosity, what was that little secret?
Darwin: It's better you don't know.
Gumball: Sure... but I told you mine, therefore I think it's fair you tell me yours.
Darwin: Nah, let's just play instead.
Gumball: [Annoyed] Yeah, let's just play...
[Gumball's character starts hitting Darwin's character consecutively, without Darwin being able to block any]
Gumball: [Thinking] Look at him standing there, knowing his secret. I'll get it out of him if it's the last think I do!
Darwin: Wow, you're pretty good at this!
[Gumball rapidly spams the controller. His character knocks out Darwin's. "End It" appears on the screen while Gumball's character spawns a large mallet. The character then proceeds to smash Darwin's character into the ground. "Gumball Wins" is displayed on the screen, ending the game. Suddenly, Gumball's character starts repetitively smashing Darwin's character uncontrollably with the mallet. Gumball is angrily hitting the buttons on his controller. Darwin looks wide-eyed at the screen, then at Gumball]
[Darwin is sitting at the dining table. Gumball comes on-screen with a plate of baked beans and mashed potato, which he gives to Darwin]
Gumball: There you go, old pal!
Darwin: What's the occasion?
Gumball: Can't a guy just make a meal for his best buddy?
Darwin: This hasn't got anything to do with the secret, has it?
Gumball: Secret? No. What secret?
Darwin: Hmm... [Starts eating] You're giving me this food so I'll tell you the secret, aren't you?
Gumball: [Sly voice] Am I?
Darwin: Are you? [Begins gasping due to the intense spicy flavor from the food Gumball gave and Darwin's skin turns red as he is likely "burning"] Did you do something to this food?
Gumball: [Sly voice] I don't know. Did I?
Darwin: [Exhales smoke as his mouth begins burning, then begins mumbling] I need water! I need water now! I need water!!
Gumball: Sorry, excuse me?
[Darwin jumps above Gumball to get water from the tap, but the tap itself is tightened by Gumball to prevent Darwin from getting water]
Gumball: Tap's are a little tight, eh? [Swings a wrench, indicating that he tightened the tap]
[Darwin then runs to open the fridge to get any available drink, but the only items are mustard, garlic, cactus, chili, and hot sauce]
Gumball: Looks like we're all out of drinks. Oh, wait, what's this? [Shows a glass of milk to Darwin, but pulls back as Darwin tries to get it] You want it?
Darwin: [Mumbles] I want it! I want it!!
Gumball: What's the secret? [Darwin shakes his head, refusing] Oh well... [Begins running away from Darwin to prevent him from getting the milk, Darwin also starts to chase Gumball]
[Gumball continues to taunt Darwin with the glass of milk and pulls back in various movements to torture him. In a few seconds, Gumball finally puts the glass of milk on the floor as Darwin drags himself across the floor. As he starts to take the glass, Gumball grabs the glass and puts it slightly further to further torture Darwin. Finally, Darwin cannot handle the torture any longer]
Darwin: [Mumbles] Alright! Alright! Alright! [Falls down and his open-wide mouth starts flaming]
Gumball: Oh man... [Picks up the glass and splashes milk into Darwin's mouth to put out the fire. Darwin's skin goes back to normal]
Darwin: Thanks, Gumball!
Gumball: [Sighs] You're welcome.
[Gumball is currently calling someone inside phone booth]
Gumball: [Fake female voice] Uh, hello! Is uh... Darwin Watterson there, please?
Richard: [Suspiciously] Is this a telemarketer?
Gumball: Uh, no. It's a recorded message.
Richard: Oh, okay. [Calls Darwin with a weird tone] Darwin, tele-phooone... [Darwin arrives and gives him the telephone]
Gumball: Congratulations! You've been selected to win a special prize!
Darwin: [Over phone] Coooooooool!
Gumball: Just answer this one question correctly! When you were locked in the bathroom, what were you going to tell Gumball?
Darwin: [cheers] Oh oh! I know this one! I know this one! I'm gonna win a competition, Mr. Dad!
Richard: Wow! What's the prize?
Darwin: I don't know. [To the phone] What's the prize?!
Gumball: It's uh... vouchers. For beauty spa.
Darwin: [Disappointed] It's spa vouchers.
Richard: At last! A manicure!
[Suddenly the call is interrupted by a voice informing Gumball to insert 25 cents to continue using the phone]
Phone Voice: Please insert twenty-five cents to continue your call.
[Gumball tries to find a quarter to continue, but finds nothing]
Gumball: Ah! Ah-ah! Come on! G-give me your answer!
Richard: Ooh! Ask them if they can do a foot massage and will they do my roots.