The fall of the miraculous

Prologue: Nightmare Lion rises

After defeating the sisters that were akumatized Ladybug goes with Rena Rouge to take her miraculous, Chat Noir in that time left the girls sleeping in her beds and went out searching for Ladybug then found her but she didn't notice him so she walked into master Fu's apartment Chat Noir evesdropped them:
-Here master fu the fox miraculous...-
-Very good Ladybug you have made a wise choice in returning it but I have a question...-
-Yes, Master?-
-Why don't you tell Chat Noir that I am here?-
-Master, i think it's safer if only I know that there are more miraculous I think Chat Noir will take it lightly-

And it was at that moment that he was engulfed in stress, why? Wasn't he trustworthy? he didn't want to know so he ran off before the finished the conversation

-Marinette there has to be trust between you and your partner tell him the truth because if he finds out alone I think he wouldn't be happy...-

But it was too late, outside in the dark with the full moon as the witness, on the rooftops filled with hate, Chat Noir had died, and became Nightmare Lion...
Hawkmoth fell the anger surging through Chat Noir and seized the chance to akumatize him and create ultimate chaos, but when he was ready to send out an Akuma chat noir entered Adrien's room!

Hawkmoth fearing he would do something to his son he flew out to end chat noir himself until he saw chat noir was his son... 

Adrien was Chat noir e couldn't believe it he was fighting his son all this time and hated him, but he thought of a better idea, he approached Adrien as his father:

-Son, we need to talk-
Adrien opened the door as Plagg was sleeping under Adrien's pillow
-What is it, dad?-
Mr. Agreste took a deep breath -Son, I know you are Chat Noir-
Adrien surprised said -WHAT? that is ridiculous dad I am here ALL the time and Chat Noir is always out!-
-Adrien admit it-
-I am not!-
-Then what is this under the pillow?!- Mr. Agreste took the pillow and saw plagg sleeping
Adrien couldn't believe it -Dad... you can't tell anyone... please-
- oh, I won't because I have to tell you something too-
He called on Nooro and transformed into hawkmoth -I am Hawkmoth the villain you have been fighting but let me explain why...-
Adrien's mind couldn't process that  which happened in his eyes
- I want power to bring back your mother, she had a plan to become a powerful family and not in the money but being superheroes but she died we studied the miraculous from texts I tried to steal the cat and ladybug miraculous but they were grabbed by a guardian and I only had 2 the butterfly miraculous and your mom's, please Adrien join me and we can be a family together!-

Adrien couldn't think clearly his father Hawkmoth told him they have another opportunity to be with his mother... he wished that so much... and so filled with hate to those he trusted and desire to bring back his mom he said:
-yes, father-
-Good son- he said -kneel now you are baptized by me as Nightmare Lion...-
-Plagg... Claws out...-

So he transformed into Nightmare Cat which had red eyes and it wasn't a good cat anymore...

In the apartment of master fu, wayzz felt a shock for the cat miraculous was used for evil purposes:
-Master...-
-Wayzz? what happened?-
-The cat miraculous has fallen into the hands of evil!-
-Oh no...-

And that night was the night Nightmare Lion was born...