Abandoned Kittens (miraculous story)

Strange murders and kidnaps have happened in the city of love witch now is the city of killers. Any policeman or investigator found any crucial clue about It, they started to give up.
Just one of them had a idea, the idea to put civilians to investigate the case, but not any civilian.
Marinette, Adrien, Alya and Nino, 4 different teenagers that never saw each others face in they role life and now they gonna have to work together and find who is behind those crimes.
Will they do it?
Warnings:
*The caracthers of this story belong to Zag and this story is NOT canon that's why is called fanfic (Duhhh)*
*It contains sin and maybe lemon (idk yet), i will warning ya in the begining of the chapters*
*It gonna contain some bloody scenes and other things here and there that aren't for lovely angels read*