The scene begins in the middle school gymnasium. Lynn Jr is in the gym.

They must do a 3-lap connected course.

The students are exhausted except Lynn Jr who is more careful and she is more athletic than them.

"So you've only gone one round. You still have two laps to do. "

She tries to motivate her classmates to do it but they are too exhausted to continue.

"Weak!"

As she was about to continue, a student ran alongside.

It's Kim. The school's second athlete and rival of Lynn Jr.

(He's the same Kim in Miraculous Ladybug. But he's wearing a white sweater with red sleeves and he has a design of a thigh on it. He's also athletic.)

"8 ... 9 ... 10 ... and 15! New record!"

"Wow! Kim, you are the first student to do more turns than Lynn. I'm impressed. "

"Thanks Coach. "Kim thanks the gym teacher.

"Kim…" She's smart that someone else has broken her 11 lap record.

The next day is basketball on the program.

As usual Lynn Junior was playing solo, she ran towards the opponent's basketball hoop.

The sporty girl is surrounded by two opposing players.

"Lynn, over here! I'm not stuck. "

Lynn really doesn't want to pass the ball to Kim and prefers to do the basket on her own.

"Lynn passes Kim!"

"Grrr! Kim! " The sporty girl passes the pass to the boy.

Kim throws the ball into the basket and scores the goal.

"Well done Kim. You really are number 1. " The coach declares.

His words are repeated a few times in Lynn's head and it really makes her angry.

The scene changes to Hawk Moth's lair.

"A sportswoman with a desire to win and absolutely wants to be number 1. You will be number one for my Akuma."

The black butterfly flies out the window and arrives at the gymnasium. Get absorbed by the sports headband on Lynn's head.

{Sportacus, you who want to be number one. I give them the power to do it. In return you bring me the Miraculous of the heroes of Royal Wood.}

"Let's go! "

Lynn transforms into an Amazon with gladiator armor. His headband turned into a helmet with a 1 written on it.

"I'm number one ! "The Amazonian girl makes a hole in the wall and goes inside.

She sees a group of students playing prison ball.

Sportacus takes the ball and throws it at them. The four are defeated and Sportacus earns a medal which appears on his armor.

"Again! Again! Again! I want to be number in all areas! "

Sportacus goes to town looking for opponents to defeat.

Weight training, swimming, street hockey, soccer.

Sportacus wins a lot of medals. Each of the medals won increases his ego and his competitive spirit.

"I want more! I have to become a number! Kim! "

She returns to school to challenge Kim.

At the same time. Marinette, Nikki, Lincoln, Clyde and Lee walk home.

The group sees the Amazon girl destroy everything around her as she challenges a muscular man in a tug-of-war and defeated, Sportacus does a victory dance.

"This victory dance is familiar to me ... Lynn!" Lincoln recognized his older sister.

"A new villain. Ladybug, Chat Noir and Ace de Roi are coming soon. I will be able to film them live on my Ladyblogue. "

Nikki picks up her phone and follows the villain.

"Nikki, wait! It's not a good idea ... "Marinette tries to persuade her, but her friend is already gone.

"Why, she's going where he's in danger. Tikki, Spot .. "

Lincoln, Clyde and Lee look at Marinette oddly.

"Tikki?"

"Tikki is the name of a cat. I just have to go and feed her, immediately." Marinette lies and leaves.

"Oh ok..."

"Clyde, I'm going to go too. I have to make sure my family is okay. " Lincoln said.

"Ok, tell me when they are correct."

"Yes." Lincoln leaves.

"Only the two of us are left. Lee? Lee? " Clyde turns and sees that Lee is no longer there. "Where did he go?"

Sufficiently far away, in an alley. Lincoln turns into the Ace of King.

The Card Game superhero jumps from roof to roof to look for the villain.

"Lynn has turned into a naughty sportsman. Knowing Lynn, she must be in a place where you play sports ... Royal Wood football stadium! "

Ace de Roi has an idea where Sportacus is going to go.

Ace of King is joined by Ladybug. The two superheroes watch the Amazonian girl take on fencers during a fencing tournament.

"I will win more medals and become the ultimate number one! "

Sportacus takes a fencing sword and fights each of the participants.

Adrien, who participates, goes to the locker room.

"Plagg, we must act. "The blond boy said to the black Kwami.

"Can I at least finish my Camembert? "Adrien gives him a look. "Okay..."

"Plagg, Claw up!" Adrien transforms into Black Cat.

Back to the tournament. Sportacus managed to defeat all the fencers in the tournament.

The Amazonian girl wins more medals but wants more.

"Kim!" She sees her sporting rival in the face.

"Who are you? And how do you know my name? "

Sportacus takes on the athletic boy. She was about to attack him with her sword when Ladybug saved him.

"A yoyo? "

{Sportacus, here are your new opponents. You absolutely have to defeat them, do you understand? Otherwise I'll take away your powers.}

"They are not a real challenge. Okay." Sportacus goes near the shed and picks up the sports accessories.

It throws all soccer balls, basketballs, baseballs, foam balls etc.

The three heroes do their best to dodge the bullets.

Sportacus takes the baseball bats and attacks them.

Black Cat takes his staff to fight against the enemy.

"Give me your Miraculous."

"Never!"

Sportacus takes the net from the hockey goal and throws it at them. The three heroes are imprisoned.

"Cataclysm!" With his destructive power, the three heroes are freed.

"Let's be equal. Lucky Charme! " His power spawns boxes that gym teachers have. "Cartons? How can I use this? "

"While you're thinking. Full deck!"

Strong Suit appeared.

"Do you think you can beat me? "

"Sure, I'm a Strong Suit! "

The two fight in a sports series.

During this time. The ladybug girl tries to figure out the item obtained by her Lucky Charm.

"I have an idea. "

The two competitors do different disciplines.

"Yellow card! "

"What!? Why? I did not break the rule. "

"If with your armor. "

"This armor is part of me."

"Red card! Exit the field! "

"What!? It is unfair! "Distracted by it.

Ace of King and Black Cat seize the helmet. Break it.

The black butterfly is out, and is captured by Ladybug's yoyo.

"Miraculous Ladybug!"

Millions of ladybugs repair all damage caused by Sportacus. Lynn Jr is back to being as before.

The scene returns to the Middle School gymnasium.

"Kim, I'm sorry to be imported. It's just being number one is everything to me. "

"You know Lynn Jr, I consider you my rival. You are the only one who is really good here. "

"Thanks, Kim."

The two are now rivals in sports and the school's top athletes.