Ladybug and Cat Noir confront a friend of Master Fu. Transformed into Backwarder, she wants to catch up on wasted time by stealing others for a letter that she thinks it comes from Master Fu.

When Cat Noir almost understood that Marinette is Ladybug, Marinette panics and makes him believe she's in love with him to distract him. But her parents hear her and Tom, absolutely thrilled, invites Cat Noir to have breakfast with them. However, when the superhero tells them that he is not in love with Marinette, Tom, heartbroken, gets akumatized by Hawk Moth. Now as Weredad, a monstrous guard dog-man, he locks up Marinette in a prison of brambles to protect her from the outside world and heartbreak. Separated from Tikki, Marinette can't transform! Will Cat Noir be able to make Weredad see reason? And will Marinette find Tikki in time to stop her father?

Lila is back in class and seems to get everything she wants from her classmates, but Marinette believes she is lying and does not trust her, and she has the attention of her love Adrien.

When the director of a new film inspired by Ladybug and Chat Noir gets neglected and put-down at his premier, he turns into Animaestro, who wants to show the world what directors are really made of.

It's Marinette's fathers birthday and goes to look for her grandfather Rolland to celebrate with them.

In this marrinette and her friend made a song album but xy's dad copy it listening this luka filled with anger and get aakumatized become silencer and take everyone's voice

After Ladybug and Cat Noir lose their memories, they must find a way to defeat Hawk Moth and get their memories back before they learn too much about one another.

Thanks to the comments of Chloé Bourgeois to Aurore Beauréal at the Collège Françoise Dupont, Ladybug and Cat Noir once again face Stormy Weather.

Luka convinces Juleka to offer herself as a model for some new clothes Marinette created, and Alya takes advantage of the situation to invite Adrien to help out, so he can bond with Marinette. Lead by jealousy, she once more becomes Reflekta, To make matters worse, Marinette and Adrien are having issues with their Miraculous.

Lila tricks Adrien into hanging out with her, when Kagami finds out she wants to keep Lila away from him and becomes Onichan.

Sabrina is mad at Chloé for the attention she gives to Ladybug. She becomes Miraculer and has the ability to take away powers from superheroes.

Adrien goes to the Musée Grévin (a wax museum in Paris) to make a mold for a new wax figure of himself. Nino, Alya, and Marinette come too, along with Manon Chamack, who gets akumatized into The Puppeteer, Again.

Marinette and her friends hang out at the Couffaine residence to listen to them play. Jagged Stone approaches them and explains that he is looking for a new guitarist after he fired his old guitarist Vivica. Suddenly, they are attacked by Vivica, who has been akumatized into "Desperada" and can capture victims in her guitar case with her magic trumpet. The group scatters and Ladybug fights Desperada, but is forced to retreat. Lucky Charm directs her to Master Fu, where she takes the Snake Miraculous and gives it to Adrien. Adrien decides to forego his role as Cat Noir in order to woo Ladybug directly and transforms into the snake superhero "Aspik", but after so many "second chances", his role ends up getting Ladybug hit by Desperada's power over and over again in so many ways. Realizing the error in his role, Adrien suggests to Ladybug that Luka should wield the Snake Miraculous instead. This allows Adrien to go back to being Cat Noir in which he's comfortable in. Luka transforms into the snake superhero "Viperion", and with a couple more "second chances", Ladybug, Cat Noir and Viperion are able to defeat Desperada. Afterwards, Jagged apologizes to Vivica and rehires her.

Marinette's class is having a field trip to London, but Marinette believes she cannot attend since doing so would leave Paris vulnerable to Hawk Moth. Master Fu gives her the Horse Miraculous, which grants the power of teleportation, so she can enjoy herself and be able to return to Paris in case of an emergency. Max's mother, a train conductor who directs the Startrain, dreams of being an astronaut and has taken an exam to begin training. However, a rogue akuma gets aboard the train to London in Sabrina's big suitcase after a botched attempt to akumatize Officer Roger. When Max's mother succumbs to nerves waiting for confirmation about whether she passed, the akuma infects her and turns her into "Startrain" itself, and she drives the train into outer space. Since the akuma is outside of Hawk Moth's range of influence, Gabriel is forced to rely on the heroes to rescue Adrien. Ladybug gives Max the Horse Miraculous, turning him into the superhero "Pegasus". With his aid, the heroes teleport the train back to Earth, so Ladybug can safely purify the akuma. Afterwards, Max's mother gets the e-mail confirming she passed her exam, much to her delight.

When Tikki tries to stop Plagg from eating a piece of cheese in the classroom, Ms. Mendeleiev, Collège Françoise-Dupont's physics teacher, catches them, but they escape. Ms. Mendeleiev tries to prove the existence of the magical creatures on a TV show, but the viewers are not convinced by her theory. Marinette and Adrien become convinced that their partner must be one of their fellow students, and Adrien even specifically suspects Marinette; conversation reveals that they must give up their Miraculouses if their identities are compromised, even to each other. Angry that no one believes her theories, Ms. Mendeleiev gets akumatized into "Kwamibuster", a Ghostbusters-themed villain with a vacuum to capture kwamis. Both superheroes lose their kwamis to Kwamibuster, so Adrien hides in a costume, and Marinette flees to Master Fu. She borrows many other Miraculouses despite the physical risk, and has Mullo of the Mouse Miraculous transform her into "Multimouse", giving her the power to divide herself into miniature clones. Some of her clones also use "unify" to undergo alternate transformations and employ the various kwamis to best Kwamibuster, freeing all the captured kwamis. Multimouse then uses the Fox Miraculous to make it appear that Marinette and Ladybug are two different people to erase any idea from Cat Noir of them being the same person. Cat Noir apologizes to Ladybug for his kwami being at "that elementary school" (to convince her that he is not a student there) and discourages Ms. Mendeleiev from making any more attempts to prove the kwamis are real. Marinette returns all of the extra Miraculouses to Master Fu. He remarks how exceptionally strong Marinette is to have used so many at once.

There is a new exhibit in the museum. As Alya digs deeper to find out about the Miraculouses, she sees that the symbol that is with every past Miraculous holder- that Marinette recognizes as the symbol on the Miracle Box- is also on the new exhibit. Master Fu recognizes the new exhibit as a sentimonster he accidentally created in the past which destroyed the Order of the Guardians.

Marinette and Kagami find themselves teamed up in a cross-Paris scavenger hunt to win time with Adrien. Kagami's mother is against her participation and becomes akumatized into the giant centaur mecha Ikari Gozen, who can swallow people up and imprison them inside her armor.

A villian from the future travels back in time to try to defeat Ladybug and Cat Noir when they are younger. The heros meet a hero from the future who had been trapped in the pass for centuries.

Nino throws a party for Adrien, but when Wayhem can't get in, he is akumatized into Party Crasher.

When he can't find anyone to test his video game that pits formerly akumatized villains against one another, Max again becomes one himself: Gamer 2.0. Let the games begin!

When Marinette makes a serious mistake, she has to face the consequences by fighting the last person she ever imagined would get akumatized.

When Félix, Adrien's cousin, visits Paris and sows discord between Adrien and his friends, Alya, Rose and Juleka get akumatized into the Trio of Punishers. Can Ladybug and Cat Noir stop the three villains and reason with Félix?

Lila manipulates all Marinette's close ones, who turn against her, but an even bigger problem awaits Marinette: she is going to have to face a sentimonster that has taken the appearance of Ladybug.

While babysitting Nino's brother, Marinette hides her secret by telling a white lie, causing Chris to get akumatized.

Ladybug and Cat Noir challenge the Bourgeois couple. Now Heart Hunter, a two-headed Cerberus that devours all the love in Paris.

Hawk Moth akumatizes Chloé into Miracle Queen to make her take control of all Miraculous holders. Will Ladybug and Cat Noir be able to escape this fatal plan?