It's night in Great Lake City. The Casagrandes slept peacefully until they were awakened by loud music.
Ronnie Anne was the first to be awakened.
"Sergio!" She leaves her bedroom to find the parrot partying in the living room with the pigeons.
"The night is the party!"
Sergio and the pigeons dance until the music stops.
"Sergio! How many times have you been told not to party in the apartment? "Ronnie Anne is angry.
"Say I think 20 times."
"We need our hour of sleep and Lincoln has to come tomorrow. "
"Oh your little..." Ronnie Anne gives a menacing look. "... Your friend. Ok, guys, the party is over."
The pigeons leave the apartment. The Mexican American girl can finally go back to bed.
"... For now. Sergio said while wearing his party glasses.
The next morning. Ronnie Anne joins his family in the kitchen for lunch.
Lunch is quiet until the parrot celebrates again.
This disturbs the Casagrandes and prevents them from eating.
"Sergio!"
Elsewhere, Gabriel is in his car meeting his work associate.
Along the way, he speaks with his son via video call.
{Which today you wouldn't be home for two weeks?}
"For example, my partner and I are working on a really important project that requires my attention. "
{I see but for my...}
"Nathalie has already organized your schedule for your photo shoots and appearances in commercials. As soon as I'm done, I'll be back. "
{Okay, dad.}
Gabriel cuts the communication. The vehicle turns left when its Miraculous senses negative emotions.
"Negative emotion. Perfect. Nooro, transform! "
Gabriel transforms into Hawk Moth and sends his Akuma towards the source of the negative emotion.
The black butterfly flies to the Casagrande apartment.
At the same time, Lincoln arrived.
"Hi Ronnie. Didn't you say you were throwing a party? Lincoln refers to loud music playing.
"We don't organize. It's Sergio. Since yesterday he thinks only of partying. It's really annoying. "
The black butterfly appears and goes to the Mexican American girl. The white-haired boy and his white Kwami preview.
"An Akuma! Ronnie Anne, calm down. I'm sure we're talking. You could fix that."
"Maybe you're right." Her negative emotions dissipate and the black butterfly moves away.
"That there is?"
"Nothing... I have to use the toilet quickly!" Lincoln invented it as an excuse to walk away.
"Lincoln, even though Akuma is far away. Ronnie Anne's family may still be targeted because of the racket the parrot is making. "
"It's true. We need to get him out of here."
The black butterfly flies to Frida and Carlos who are unhappy with the parrot playing its loud music.
Lincoln chases the black butterfly to Ronnie Anne's aunt's studio.
The Akuma is about to be assimilated by Frida's brush.
"Frida! You can do this? "
Lincoln takes the brush and draws. This gives inspiration to Frida.
"Wow! Inspiration!" She begins to paint using her husband as a model and music as a source.
The black butterfly moves away from the couple. Lincoln succeeds in calming Ronnie Anne's family.
Excepté Abello.
"That's enough. I can't!" Angry, he takes the parrot's dark glasses and smashes it.
"My glasses..." Sergio is sad.
The Black Butterfly flies towards the parrot and is assimilated by its glasses.
{Bird Party, my name is Hawk Moth. Everyone tells you that the party is over but I give you the power to continue. In exchange, you bring me the Miraculouses of the heroes of Royal Wood.}
"Partying!"
Sergio transforms into an airplane version of Xecotcovach with wings that have speakers attached.
"It's party! "
Bird Party releases musical waves in the city, the music makes people dance.
The Casagrandes, Ronnie Anne and Lincoln start dancing because of the music.
"Why am I thinking?" Through the window, Lincoln sees a giant bird that looks like Sergio.
"Sergio!?"
"Hawk Moth has claimed another victim. Quick, Lincoln, transform yourself."
"As, Let's Play! "Lincoln transforms into the Ace of King and chases after the flying villain.
Ace of King sends a message to others about the Bird Party.
The scene changes to Royal Wood. Marinette as Ladybug wonders how to fight against a flying enemy.
"Master Fu must have a solution."
The ladybug girl goes to the guardian of the Miraculous and explains the situation to him.
"A villain who steals? I think the grimoire has a solidity for that. It's time to unlock new powers."
"New powers? "
"Right." The older man in the Hawaii shirt reads the digital pages and makes one of the recipes.
"With its formula, you and your allies will be able to fly. "
The girl drinks the liquid and transforms into Cosmo Bug. She now has a flight suit, with a dosing thruster and a helmet.
"Here, to give to your allies. "
"Thank you teacher. "
Cosmos Bug, she goes to see Cat Noir and Viperion. Give them the Formula and the three fly to Great Lake City.
Meanwhile this time in the city of Downtown. Citizens are forced to dance against their will.
"Ooh! Oh! It's party! "
The superhero card throws his cards to slow down the villain but fails as the enemy is too high to reach him.
"Damn! It's too high to reach it. How am I going to stop it? "
? : Need help?
See her allies with flying suits.
"Since when do you know how to fly? "
"Thanks to this."
As takes the formula, drinks it, and unlocks the flight form.
He wears a flying jumpsuit version of Ace Savvy, his helmet is white and he has a blue cape on his back attached with a metering thruster.
The four superheroes fly towards the supervillain.
"Who are you? I won't let you ruin the party! "
Bird Party launches sonic waves at them. The four superheroes dodge the waves.
"Full Deck! "Night Club appeared.
"Lucky Charm! "A musical score appeared.
"Night Club, play it's music."
"Ok dude. "The young guitarist plays music on the score.
Night Club's music repels that of Bird Party.
"How dare you ruin the party? Sonic Wave! "
It's a music fight. Both are melodious fighting each other.
Distracted by this, Astro Cat and Winged Serpent sneaks up behind the giant bird.
"Thanks for the glasses. Cat, catch! He rips off the glasses and throws them at Cat Noir.
"Cataclysm!" The glasses are disintegrated.
The black butterfly came out and got captured, then purified.
Sergio becomes again as before all that. After that, the parrot learned the lesson from now on, he will limit his parties.
After that, Marinette uses the formula to create multicolored buttons for each of the new powers and gives them to her three allies.