The scene begins in Lincoln's bedroom. The boy circles the first month of April. He turns to viewers.
"Today is April Fool's Day, Luan's favorite day. Every year she plays pranks on all the members of the family. " He explain to viewers.
It shows several flashbacks of which the family fell victim to Luan's pranks.
During the previous April Fool's Day, Luan released chickens into the house.
On another April Fool's Day, she rolled up toilet paper around the house.
Another memory, she locked everyone up in green gelatin in the kitchen.
Last month's one, she had all the furniture glued to the ceiling.
"This year I won't be fooled." The boy with the white hair is determining.
He opens the door to his room, and reveals to his family that they are each taking their precaution.
"Quickly no more bubble wrap!" Lola and Lana are wrapped in bubble wrap.
"I would need more protective gear." Lucy has the creature head on her head.
"Where's my helmet?" Lynn searches for her helmet.
"Bobby, we're going to have to cancel his plan. Yes, these are Luan's pranks. " Lori tells her boyfriend. Bobby ask what. The blonde girl tell the reason
At the same time, the musician girl asks her little scientific sister to take shelter in her bunker.
"Please Lisa." The musician girlbeg their intellectual sister.
"You should have prepared the days before." She tell Luna.
"Please!" She begs her on her knees.
Lincoln is near the stairs, his sister Lola stopping him.
"Raise your Lincoln arm. It's your turn to be rolled up. " She was going to wrap her brother in bubble wrap but the boy with the hair prevented her.
"No need, Lola. This year, I won't be pranking. " He is determined.
"You are crazy!?"
"Girls, girls. I just have to unlock my room all day until April 2. I have food and video games. And if I want, I have this bucket. "
Sisters except Lana; ewww.
"Cool." Lana said.
"Hasn't anyone seen Leo?" Leni ask.
They see their brother walking upward surrounded by a force field next to Luan. The sisters are scared.
"Greetings to the family. Hope you are ready. Today is Prankmas Eve. Hope to be preparing you. "
The girls are shaking with terror. Lori notices that Leo remains calm.
"Why are you calm?" Luna wondering.
"For that." He takes out a remote control from his pocket, presses the button in the middle.
A white jacket is thrown of the wall, go attached to Luan, and a hatch opens under his feet.
She falls in the basement, on a pillow in a vault.
"What was that?!" All the sibling except Leo are surprise.
"I built a vault in the basement in case of an emergency."
"So that means we're going to get no pranks from Luan?"
"Yes, to me she manages to escape… A.I E is watching there."
The A.I lock all the camera system at the brun hair girl in the basement.
Thanks to the invention of Leo. The family can have a quiet day for the first time during April Fool's Day.
They were each doing their own thing when suddenly the alarm sounded. The boy in the blue jacket looks at the screen of his watch.
"Oh no! Luan has escaped! "Everyone panics.
"We are condemned!"
"Quickly to my room, we'll be safe." They run to Lincoln's room.
As siblings make their way to Lincoln's bedroom. Their relative was standing there. Rita wears padded gear while the father carries the bubble wrap.
"What is this chabut?" The parent asking.
"Luan escaped!"
"What!? Leo, did you lock Luan up? "
"She managed to hack A.I E."
"Let me see, A.I E do you hear me? A.I E, Do you hear me? Are you correct?" Via his mini computer watch.
[~\~~\\\\\ Error ! Error! Error! Lauch Reboot of the system..] A.I E disfonctionne and talk funny.Leonardo saw that his artificial intelligence was wet. He realized that his big sister must have used his flower sprinkler, watered the program and created a malfunction.
"Plan B! Retreat!" he and Rita run downstairs.
They are finally in Lincoln's room, but Lincoln receives a message son is phone. It's Ronnie Anne who warns her that she is coming right now.
"What now? She didn't choose her time to come. Could it get worse? "He said without thinking about the consequence of his sentence.
He pulls a rope on the wall that connects a vacuum cleaner sticking to the ceiling and his bag opens. The white-haired boy is covered in dust.
"Two positives, one I have my answer and two I have my solution. I'll go through all the pranks. "
"It's not safe there!" The sporty girl says.
"Do not worry. You stay there, I have a job to do. "
"Wait, I'm coming with you." Leonardo wants to help him.
"Are you sure Leo?"
"Sure, the brothers must stick together. "
"Don't worry Lincoln and Leo, I'll plan your funeral." The goth girl said.
The sisters close the door. The brown haired boy puts on a belt that creates a force field.
"Let's start with the kitchen." Leo suggest.
The two boys go downstairs, they see a sign that says: Cooking over here.
"She seriously thinks I'm going to go to the kitchen after reading this, Luan is wrong, I don't get fooled!"
Lincoln and Leo taking the other way to go to the kitchen. They see grease on the ground. The two boys walk cautiously but a device is engaged.
The device pushed the two boys into the fridge, both out but slipping and causing the belts to malfunction.
A bunch of vicious scrubbers are on the stove.
"Raccoons, seriously? At least we have the energy shield you invented. "
The force field stops. Now they are really in danger. The anger beast the attacking thé two boys.
"I made a dish from scratch." Luan tells a joke in living-room.
Outside Lynn Sr and Rita try to convince Lisa to open them. But the intelligent girl keeps them waiting.
"Lisa Marie Loud, you will open us now if not…" She use the full name of is daughter.
"Before I would need your assurances. And you promise me you won't punish me for future explosions in the house. "
Both parents were about to say their answer when they saw the prankergirl with a stack of stinky diapers of Lily.
"She won't dare." Rita said.
"Lisa!" Lynn Sr call is daughter and continued to knock the door of the shelter.
She opens it to them and show the paper, tell them where to signe. "Sign here and initial here."
Signed, the parents are refugees inside. Luan shootat them with his dirty diaper.
Meanwhile, Leo and Lincoln endure all the jokes one after the other at the house.
Lincoln and Leo arrive at the door with Luan beside them. He opens it and turns out to be Ronnie Ann with a gift box in hand.
She opens it, unveils a cream pie. Lincoln thought he was going to get it in the face but turned Luan.
"At least we survived, didn't we Leo? Leo? " The white hair noticed is brother acting weird.
[Error! Error! System software damaged! System damaged! Self-destruction! Activated!] Leo explodes.
Parents and sisters go to the living room, see the bespectacled brown haired boy in pieces.
"That happened?"
"Leo took all the pranks and he blew up." Lincoln tell.
"What!?" All said.
"Luan!" They yell the name of the pranker girl.
"But I didn't want my little brother to explode, I'm sorry Leo! I only wanting to make fun not hurt someone like that." She feels guilty.
The whole family mourns the loss of their sibling.
"Leo, the only one who understands my science." Lisa says.
"He was always there to help us." Lucy said.
They continue to cry, while they are not looking, the real Leo entered through the door with a soda can in hand and he drink.
"What happened here?" Leo asking.
"Leo !? But if you are there, who is he? " Lori is confuse.
"It? It is an Android prototype that I had built last month with Elisabeth, I wanted to test it and as a result, it is destroyed. " He explain to is sibling.
Glad it's okay. His brother and sisters with their parents hug him.
"I'm glad you're okay, I was afraid we for a second you got hurt." The brunette girl with the ponytail is relieved.
"Everything is fine. Luan, everyone is safe and sound. "
They continue to cuddle their brother.
"The important thing is that we are with family…" He said looking at the viewers, his eyes shining with a red light like a terminator robot.
Reveals that the real Leo is hidden in his lab in the treehouse next to the shelter of Lisa.
"I survived another April Fool's Day. Good job # 046 and # 067. "
He turns to viewers.
"What do you think - you really think it was me? I have several copies of me in an emergency. And when the family go to sleep I'm going to have to fix # 049." Léonard said to himself.
During the night, Leonard comes out of his underground laboratory.
He takes the opportunity to recover the pieces of his android # 049, put them in his room to repair it later.
And changed places with # 067 which is in his room.
He receives a call on his mini computer watch . It is his best friend Elisabeth Harthaway .
[Leo how was April Fool's Day?] The blonde girl with glasses asks to Leo.
[As I had foreseen, the android has succeeded in founding itself among my family, they have no doubt that this is not the real me. ] Leo explains.
[Cool, were you able to collect the piece?] She asks.
[Yes, tomorrow I'm going to start the repairs, would you like to come and help me?] He asks his friend.
[That will make me happy.] She said blushing.
Agreement for tomorrow's plan, the two pick up and sleep.