One day in the mushroom kingdom...
"it's so nice of you to arrange this picknick for us two Mario" Peach says. "no problem princess" Mario says. Meanwhile Bowser watches them trough binoculars. "bwahaha, get ready." he says. Suddenly one of his doomships flies to Mario and Peach and fires a bullet bill at Mario, blowing him aside. "Mario!" Peach screams. Mechanical hands come out of the ship and lift up the picknick rug, trapping Peach in it and take her away. Bowser laughs "though luck Mario" he says while he leaves, laughing. "Not again..." Mario says.
In Bowser's castle... Peach is put in a cage. Everyone leaves after the cage is locked. "Mario..." Peach cries.
Meanwhile Hawk Moth's window opens while in front of it a portal is opened by Claudia. "The negative emotions of a damsel in distress, a perfect prey for my akuma." Hawk Moth says while he makes an akuma and sends it trough the portal "fly away my little akuma, and evilize her!" Hawk Moth says.
The akuma approaches Peach and lands in her brooche. "Princess Mushroom, I am Hawk Moth, I am giving you the power to put anyone down, so you'll never be hurt by anyone ever again! In return, I want the miraculous of Ladybug and Cat Noir, I am quite sure they'll show up soon enough." Hawk Moth says. "yes Hawk Moth" Peach says and gets akumatized.
Meanwhile Mario was almost at Bowser's castle, having skipped a lot of levels. Eventually he reaches the castle and opens the door. It's dead quiet. "What? Is there noone here? HELLO?!" Mario says. Suddenly a green figure covered in mushroom jumped in front of him "Mario! You came to save me! Thank you, but I took care of this myself" she says smiling. "Peach?!" Mario says shocked. "I am not Peach anymore, I am Princess Mushroom" she says. "what did you do?" Mario asks. "I put them all to sleep with this" she replies as she opens her brooche and takes out a mushroom, "They are all sleeping now". "when will they wake up again then?" Mario asks. "I don't think they will wake up"she replies." What?! But that's terrible! Bowser and his troops are bad, but even they don't deserve this!" Mario says. "I think it serves them right." she says. "no! I won't let you go through with this! Stop it Peach!" Mario says. "how dare you!" she yells and throws the mushroom at him, it pops in midair and releases some sort of gas on Mario. "p-peach..." Mario says before falling onto the ground. Then she walks out of the castle.
Meanwhile
A pink cat is sitting in her castle "I am bored... I WANT SOMETHING TO HAPPEN" Klara says. Suddenly a princess with a green dress and brown hair comes in "something already happened" Elly says. "what happened?" Klara asks. "appearently Peach turned into something and is now causing chaos everywhere!" Elly replies. "What? What do you mean turned into something?" Klara asks. "I'll show you" Elly says while using her wand to open up a portal and they go through, entering the Mushroom Kingdom. Everywhere they look people are laying on the ground. "oh my..." Klara says gasping. Suddenly Princess Mushroom jumps over to them. "ah there you are Elly! I see you brought Klara!" she says while taking out a mushroom from her brooche, "now you can join your sister!"
Meanwhile, "look Hawk Moth, that's Klara, a big annoyance, but she should be the one to bring Ladybug and Cat Noir"Claudia says. "Perfect" he replies.
Elly reopens the portal. "go get help! You always now people that can help!" she says. "I will" Klara says while going through the portal quickly. Then Elly gets hit by the gas of the mushroom, she quickly closes the portal before falling onto the floor.
Klara leans against the wall and uses her future vision to try and see who could help her with this, by seeing how the future looks. After a little moment she sees Ladybug. "Hmm, a world I've never seen before... This is gonna be hard, but I am sure things will work out fine" she says to herself while opening a portal there and she goes through, ending up in Paris. "let's do this". She starts looking around and sees Alya and goes over to her. "hello, I-" Klara says before Alya interupts her "oh my gosh are you an akumatized person?" Alya asks. "a what now?" Klara asks. "an akumatized person, you know, someone has negative emotions, Hawk Moth sends an akuma to them and they go crazy" Alya says. "I think that happened to a friend of mine, I am looking for a hero named 'Ladybug', do you know where she is?" Klara asks. "whoa whoa whoa wait, hang on girl, you HAVE to tell me who you are first, cause if you're not akumatized then why do you look like that?" Alya asks. "I am from another world, a lot of people look like me there." Klara replies. "right, got any proof?" Alya asks. Klara opens a portal "will that do?". "oh my gosh"Alya says while quickly taking a picture of it. " that is so cool!" Klara closes the portal again. "now, can you tell me where Ladybug is?" Klara asks. "well... I have no idea, but if you walk around for a while you might find her" Alya says. "ok, thank youuuu-?" Klara says. "Alya, I am Alya" Alya says. "ah, I am Klara, nice to meet you Alya." Klara says as she turns to leave. "wait!" Alya says as she runs to her and quickly makes a selfie with her. "this is sooo going on the ladyblog!" Alya says. "the what?" Klara asks. "the ladyblog, a blog in which I post things about Ladybug." Alya replies. Klara thinks for a moment. "So if you post the picture... Ladybug might see it and come this way?" Klara says. "could Be" Alya asks. "okay, then I'll stay here with you if that's okay with you" Klara says. "sure" Alya says as she starts to post it.
Meanwhile in the bakery
"agh! So much to do, I completely lost track of time!" Marinette says. "well maybe you shouldn't have stayed up so late yesterday, then you wouldn't have been sleepy earlier, and you wouldn't have fallen asleep" Tikki says. Marinette sighs "you're right Tikki" Marinette says while she sits down at her desk. Tikki looks on Marinette's phone. "hey, Alya posted something on the ladyblog!" Tikki says. "Let me see" Marinette says as she grabs her phone. Marinette and Tikki look at each other in confusion. "who is that, what is she?" Tikki says. "I don't know, but it says that she is looking for Ladybug." Marinette says. "looks like you're gonna have to delay your work a little more" Tikki says. Marinette nods. "Tikki! Spots on!" Marinette says. Then she travels over there. "she seems to be at the louvre pyramid, let's do this" Marinette says.
Meanwhile, "ugh, now that I don't have fencing today I am bored" Adrien says. "how about you give yourself a nice piece of Camembert, that always makes me happy." Plagg says. Adrien laughs and grabs his phone." let's see what the others are up to." Adrien looks and sees Alya's post on the ladyblog. "whoa, I think Cat Noir should go there too" Adrien says. "why can't we ever just sit back and relax" Plagg says sighing. "Plagg! Claws out!" Adrien says. And then he goes to the louvre pyramid too.
Ladybug arrives at the louvre. Klara goes to her "ah, you must be Ladybug, I've received information that you are the person who can help me" Klara says. Then Cat Noir arrives. "need a paw?". "who are you?" Klara asks. Cat Noir gasps, "I am the one and only Cat Noir, Ladybug's partner, and who might you be?". "My name is Klara and I come from another world to ask for help" Klara says. "wow, that's so cool!" Cat Noir says. "So, what do you need help with and how can we trust you?" Ladybug asks. Alya speaks up "allow me, she speaks the truth, I saw her open a portal it was so cool, I have picture if you want proof, and apparently from what she told me I could conclude that a friend of her was akumatized by Hawk Moth". "thanks Alya" Klara says. "but that doesn't make sense, how could Hawk Moth akumatize someone in a different world?" Ladybug asks. "he might've gotten help by one of my villains so he can send akumas to other worlds." Klara replies. "I say let's go, I can't wait to see a different world" Cat Noir says. Ladybug nods "but before you go, what can you tell us anything about this akumatized friend of yours?". "She can put people to sleep with mushrooms which she can take out of her brooche" Klara says. "then the akuma is probably in the brooche, let's go!" Ladybug says. "good luck!" Alya says. "thanks Alya" Ladybug says. Klara opens a portal. "wow, impressive, let's do this!" Cat Noir says as he runs trough it, followed by Ladybug and Klara, who closes the portal behind her. "So, where is-?" Cat Noir says but she is already here. "aha, you must be Ladybug and Cat Noir, give me your miraculous so I can fulfill my part of the deal with Hawk Moth!" Princess Mushroom says while taking out mushrooms. "never!" Ladybug says. "have at you then!" Princess Mushroom says while throwing mushrooms. Ladybug and Cat Noir dodge but Klara isn't in time and falls to the ground. "oh no!" Ladybug says. "got any purr-fect ideas my'lady?" Cat Noir asks. Ladybug nods "Lucky Charm!" Ladybug says. "a hairdryer?" Ladybug says. Princess Mushroom laughs "what are you going to do with that? Dry me to death?". Ladybug sees Princess Mushroom, Peach's castle and the hairdryer in her Ladybug vision. "I've got it! Follow me kitty!" Ladybug says as she heads for the castle. "I'd follow you anywhere my'lady." Cat Noir says as he comes with her. "hey! This isn't over yet! Come back here!" Princess Mushroom says as she chases them. Inside of the castle, Ladybug finds a power outlet and plugs in the hairdryer. Princess Mushroom enters "nowhere to run now!" she says as she throws a mushroom at Ladybug, releasing the gas. Ladybug quickly uses the hairdryer to blow the gas back to Princess Mushroom. "what?! Noooo!" Princess Mushroom says as she falls back. "May I?" Cat Noir asks. "be my guest" Ladybug says. "Cataclysm!" Cat Noir says and he use his cataclysm to destroy the brooche and the akuma comes out. "no more evildoing for you little akuma, time to de-evilize! Gotcha! Bye bye little butterfly" Ladybug says. She throws her luck charm up. "Miraculous Ladybug!". And the Miraculous Ladybug fixes everything. Princess Mushroom turns back into Princess Peach. "pound it!" Ladybug and Cat Noir say.

"Ladybug, Cat Noir, you may have stopped me again this time, but I swear, this isn't over by a long shot!" Hawk Moth says.

"what happened?" Peach asks. "Peach!" Mario says as he and Klara come running in. "Mario!" Peach says. "Thank you so much Ladybug, you saved her" Klara says. "your welcome" Ladybug says. Cat Noir frowns. "thank you too of course Cat Noir" Klara says. Cat Noir smiles. "ok, let's get you two back" Klara says. They both nod as Klara opens a portal. Cat Noir goes through. "Ladybug, I have a feeling that we are going to work together more often, so be prepared okay?" Klara says. Ladybug nods and leaves, then Klara closes the portal. "can someone tell me what happened?" Peach asks. Klara goes to explain

"well that was a cool little adventure my'lady" Cat Noir says. "yes, I guess it was. See ya Cat Noir!" Ladybug says and leaves. Cat Noir smiles and leaves too. "spots off" Ladybug says and Marinette walks to the Louvre pyramid. Alya spots her. "Marinette! You are never gonna believe what happened to me!" Alya says excited. Marinette smiles. "tell me all about it".