

After Marinette learns more about the Miraculous book she took from Adrien, she begins to suspect his father of being Hawkmoth. Meanwhile, Gabriel, furious over Adrien losing the book, gets akumatized into The Collector.
Marinette has to babysit Manon, but realizes Ladybug has to interview for a television show Face to Face, so she invites Alya over and excuses herself to help her parents downstairs. Realizing she needs higher television ratings, host Nadja resorts to asking about Ladybug and Cat Noir's supposed romantic relationship, which causes Ladybug to depart, dragging Cat Noir in tow. The studio is dissatisfied and cancels Nadja's show. Laid off, Nadja gets akumatized, and Hawk Moth turns her into "Prime Queen", a haughty reporter whose ability to teleport through television screens and posters; she creates a show in order to capture the two heroes.
Legendary Parisian ice-cream maker André gets akumatized by Hawk Moth. Now Glaciator, he turns people into ice cream... which starts to melt! Ladybug and Cat Noir cannot get cold feet if they want to stop him!
After Chloé sets off a false fire alarm forcing the entire student body to do chores as punishment, Adrien scolds Chloé telling her that she needs to be 'nicer' to people if she wants them to remain friends. Chloé's butler, Jean, has her host a party for everyone and encouraging her to what her old teddy bear would do. Confident, Hawk Moth sends an akuma beforehand. During the party, Chloé tries her best, but when seeing Adrien dancing with Marinette, Chloé loses her temper and Jean accidentally reveals her teddy bear, leading Chloé to embarrassment and to fire him. Feeling vengeful, Jean is then targeted by the akuma, and turns into "Despair Bear", a doll-sized villain who has the ability to manipulate anyone he touches.
Jagged Stone decides to guest star in a live-recording television show, Fill My Shoes, where a person is taking part in another person's job, and the show featuring him is taking place at Marinette's parents' bakery. Wanting to impress Jagged, Penny is running back and forward till everything goes out of control and the intermission accidentally gets disrupted, demanding Penny to solve it all. Hawk Moth takes advantage of the pressure on Penny and akumatizes her as "Troublemaker", a villain capable of switching from tangible to intangible, making a big mess, and urges to get back at those who shunned her. Throughout the commotion, the discovery of Adrien's photos in Marinette's room has Ladybug completely nervous. Not ready to tell how she feels, Marinette later manages to convince Adrien that she is just a fan and he invites her to one of his photoshoots.
Today is a great day for Marinette: she and her friends, Mylène, Rose, Juleka, Alix and, of course, Alya, have come up with a flawless plan to help Marinette propose a romantic stroll to Adrien. But nothing is going as planned and Adrien's bodyguard, annoyed by the girls, becomes Hawk Moth's target. However, while the latter tries to akumatize him, the Gorilla calms down. The akuma then transforms a young child, who is nearby and upset at not having his candy, into Gigantitan, a fifty foot (disobedient) giant.
A mysterious masked fencer gets akumatized into Riposte. Armed with her saber, she wants to get revenge on Adrien, who unintentionally humiliated her. To protect him, Ladybug will have to cross swords with the villain!
Marinette is excited today is her birthday. Not only that, but her grandmother, Gina Dupain, is also visiting. Despite being excited to visit Marinette, Gina is surprised to see how much Marinette has grown up, but is saddened when Marinette does mostly new things. While hanging out, Marinette heads to where her friends planned her surprise party and ditches Gina. Thinking she was rejected, Gina is akumatized by Hawk Moth, turning her into "Befana", a motorcycle baddie with the ability to turn people who do bad things into coal and those who do good into angels, who become her servants, with a gun filled with candy she wanted to give Marinette.
Clara Nightingale, the famous singer, is in France to film the music video for her new song Miraculous in tribute to Ladybug and Cat Noir. Marinette is overexcited; however, Adrien is worried because he has been chosen to take part in Clara's video as Cat Noir in a duplicate costume, which might expose his identity. At the audition, after Marinette "saves" her from falling (purposely to find the perfect girl to play Ladybug in the video), Clara decides to cast her as Ladybug in the video. Marinette turns down the offer to protect her identity, but changes her mind when Clara is about to cast Chloé as Ladybug. As Marinette and Adrien are about to put on the duplicate Ladybug and Cat Noir masks, Chloé gets revenge for being excluded by having her father ban Clara from filming the video in Paris. Saddened, Clara succumbs to Hawk Moth's akuma and becomes "Frightningale", a dancing and singing supervillain, who can color the people who dance and rhyme with pink aura by hitting them with a magical mike, while also turning them into magenta statues if they resist to sing or dance.
Adrien sneaks out to watch a particular movie, Solitude, in which his mother plays the lead role, but gets mobbed and runs into Marinette whom he turns to for help. Meanwhile, Gabriel suspects his son may be Cat Noir. He sends Adrien's bodyguard after him; when the Gorilla just got his car towed for illegal parking, Gabriel transforms into Hawk Moth and decides to akumatize the frustrated bodyguard to get faster results. The Gorilla becomes "Gorizilla", a giant ape with enormous strength and a keen sense of smell, and begins to follow Adrien all through Paris. Ladybug jumps into action to save Adrien, while the latter tries to hide and transform into Cat Noir to help Ladybug. In the end, when the villain is defeated, Gabriel is convinced he was wrong about Adrien being Cat Noir since he saw both them at the same time (but he actually saw one of Adrien's fans, who disguised himself as Adrien). When the real Adrien returns home, Gabriel shows him the movie he wanted to watch, in order to gain more of his trust.