Marinette was so happy she could burst. It had been at two months since the new miraculouses Vixen and Jade Turtle joined the team. They were a great teammates not to mention akumas were a lot easier to defeat with the extra help. But the best part of it all was when they revealed their secret indentites. She was surprised but at the same time not to find out that Vixen and Jade Turtle were Alya and Nino but she was amazed and thrilled to learn that Adrien was Cat Noir and that was the start of their relationship. They were always together going the most romantic dates and Adrien always brought her the sweetest gifts. Her best friends and the love of her life were all together and protecting Paris. For Marinette it was a dream come true and life couldn't be more perfect.
Tonight Marinette and Adrien were having a picnic in the park. They ate crossiants, cookies, and spinach meat pie with ice tea to drink. After eating they cuddled up on the blanket and watched the stars.
"I'm so happy." Marinette sighed cuddling closer to him.
"Probably not as happy as I am milday." He said.
"My God if I had known we'd be so happy I would've told you my identity sooner but I was so afraid something terrible would happen or that you would leave me."
"I would never leave you. Why would you think that?"
"I don't know I guess...I don't know. But I'm not afraid of that anymore."
"Good."
"Adrien."
"Yes?"
"Will we always be together?"
"Yes Marinette. We'll always be together, forever."
"Forever is an awfully long time."
"I know."
Unknown to the happy couple Hawkmoth was spying on them. He felt his blood boil and was greatly angered by their happiness. When they finally parted from each other and went home he de transformed. Ever seen since there were four miraculous heroes his akumas failing almost as soon as they were akumatized. It infuriated him however he was very pleased to finally learn the identities of his enemies he just needed to think of a way to use it to his advantage but how?
"How Nooroo?" The shadowy figure asked his kwami. "How is it that four common children can defeat me?"
"Well master it's the way things are. Good always triumphs over evil because love is god's greatest weapon."
"Love does nothing."
"You're wrong master, love is the most powerful force in the world."
"Love is nothing more than a feeling. If love really was this powerful than I wouldn't have lost what I valued most in this world."
"I pity your tragic loss master."
"I don't want your pity! Love is a disease! A poison! It makes us weak! It must be destroyed!"
"No master love is strength. It's what drives Ladybug and Cat Noir to fight back against your dark forces."
"You are a fool Nooroo but you have given me an idea on how to defeat Ladybug and Cat Noir and finally obtain their miraculouses." He said. "I shall destroy what they value most."
"And what is that?"
"Their love for each other."
"Love is very frail but it's hard to kill master. I believe that the love between Marinette and Adrien can never be destroyed."
"Enough! Nooroo dark wings rise!" He transformed and caught a white butterfly. "Love maybe a strong emotion but I know of two that are stronger. Fear and heartbreak."
With a touch of his hand, the butterfly's white wings turned dark and fluttered out the window.
...
Adrien found himself in 15th century Paris, France. In a church, a choir was singing and guest royal and common alike sat waiting patiently for the ceremony to begin. At the front was the minister holding his holy bible and a handsome young man dressed in a royal suit and attire stood next to him. Then everyone turned and smiled as a beautiful young woman wearing a wedding gown, gloves, and a crown of sliver and flowers made her way down the aisle. She took her place next to the young man and all became quiet as the wedding took place.
"Dearly beloved." The minister spoke. "We are gathered here today in the house of God to join our brave prince and this beautiful maiden together in holy matrimony."
The couple gazed at each other lovingly.
"Do you Prince Leonce of France take this woman to be your lawfully wedded wife. To love, honor, and cherish for better or for worse, for rich or for poor, in sickness and in health til death do you part?"
"I do." The prince said.
"And do you Jeanne de Arc take this man to be your lawfully wedded husband? To love, honor, and cherish for better or for worse, for rich or for poor in sickness and in health til death do you part?"
"I do." The maiden said.
"If anyone objects to this union speak now or forever hold your peace."
But the couple were excited they could hardly wait so they leaned in for a kiss. But just as their lips had touched the church doors burst open.
"I object!"
A man dressed in robes entered the church followed by an army of soldiers. Leonce and Jeanne clutched each other fearfully wondering why the happiest moment of their lives were being interrupted.
"Judge Parish have you gone mad?" The minister asked angrily. "I will not tolerate this on the house of God!"
"Forgive me Reneverd Hostetler." The judge spoke. "But I could not allow this marriage to take place."
"Why ever not?"
"Because I regret to inform you all that the bride is under arrest."
"On what charges?"
"Witchcraft."
"What?! That is preposterous! Jeanne de Arc is a kind and god fearing woman. How dare you interrupt this wedding with such a ridiculous theory. I ask you to leave at once."
"If she is so god fearing then explain her strange behavior?" Everyone looked at each other confused. "Like sneaking off at night into the cemetery to gather strange plants."
"I use them for medicine." Jeanne said.
"Perhaps or maybe curses. Has anyone else noticed that as soon as she and the prince were engaged famine has appeared in our kingdom?"
"I will hear no more of this!" Leonce cried. "Judge Parish, as your prince and future king I order you to cease this at once! And leave us to be wed."
"My dear prince I mean no insult but you seem awfully eager to marry this woman."
"Indeed I am."
"And yet I do wonder why suddenly you called off your engagement to Princess Antoinette to marry a commoner?"
"I fell in love with her."
"Really? Fell in love? Or bewitched?"
"What? Princess Antoinette is a spoiled brat and as for the famine that's because she taxes her people dry! Where on earth did you get these ideas?"
"These charges were called by young Darcia Moreau." All eyes turned to see a young woman walk from behind the judge. "She claims that Jeanne has attacked her at night."
"Darcia, you know that's not true." Jeanne said. "Why would you say that?"
Darcia's eyes went to the prince.
"It's true! She attacked me! I saw her!" She cried. "I saw her speaking with the devil!"
"She's lying." Jeanne said. "She always lies about everything. She has no proof that I did anything wrong."
Then Darcia dropped to the floor and rolled around screaming in pain.
"Oh! She's cursed me! The witch has cursed me! She'll curse us all! If we do not burn her!"
"Arrest her!" The judge ordered.
"No! I won't let you!" Leonce said clutching his bride.
"She's cursed the prince! We must free him by burning the witch!"
"Judge Parish! This is girl is clearly making false charges out of spite and jealousy!" Reneverd Hostetler said. "I will not allow such injustice to take place!"
"She's bewitched the revered!"
Adrien watched as the bride and groom were torn away from each other's arms.
"No! Stop!" He called. "You can't do this!"
But no one could hear or see him. Then everything fades into black and he watched in horror as the young woman was beaten, her hair lovely chopped short, and was tied to a burning cross while the prince stood in a locked cell crying out for her.
"Jeanne! Jeanne! My princess! My lady!" Tears streamed down his eyes along as did hers.
"My prince." She sobbed. "My knight."
She let out a scream before being engulfed in flames.
"No! No! Dear God! You fools have just murdered an angel!" He cried. "Cataclysm!"
The prince exploded in heartbroken rage and sent the entire land to ruin with his touch and all at once everything faded into the dark. Adrien had never seen anything more horrifying in his life.
"My God. Why did this happen?" Adrien asked.
"Adrien Agreste." A voice said. "You and Marinette must never be together. It will only lead to destruction."
"What are you talking about?"
"Ladybug and Cat Noir are meant to be partners in fighting crime but they cannot fall in love."
"That's not true!"
"Since the beginning of time the ladybug and black cat miraculous are meant to fight but creation and destruction cannot join as one. They are too different. If they do then the ladybug will live a short life and perish tragically while the black cat will live long and suffer. Jeanne de Arc and Prince Leonce went against this warning and you saw what happened. If you do not heed my warning then Marinette will die tragically just as Jeanne did."
"I don't believe that!"
"Your love will be the death of her!"
"No! Not true! I can't believe it! I won't believe it! NO!" Adrien woke up covered in sweat. He was relieved that it was a dream but he couldn't help but feel worried. Was that dream true? It couldn't be.
FYI this Jeanne de arc is not the same Joan of arc for history. This a different one with a similar life and name.