The story take place 412 years after Nightmare Moon defeat by Twilight Sparkle and her friends.

The Elements of Charmony passed by to new bearers again and again, alwais ready to assist princess Celestia and Luna in times of crisis.
18 years ago a very talented unicorn with a puppet ponny with strings as cuty mark became princess Celestia personal student, only to betray her in the end.
He tryed to use mind control spell to take control over princess Celestia, after he fail, he run and under name " Mind Slaver ", he create a evil cult called " Puppet Masters " with only goal is too take control over Equestria and research immortality.

After Mind Slaver and his cult fail to take over Equestria with revived Nightmare Moon under they control, he discover an acient temple with books about interdimentional and time travels, as well as powerfull artifacts.

Mind Slaver and his cult try to summon army of NIghtmare Moons only to end up with 16 soul parts what together form a small black alicorn filly.

When cult start to work on recharging the artifacts for another summons, Mind Slaver decide to use Nightmare Moon like filly for his experiments to find alicorn weakness and research immortality, and so day by day, poor filly is experiencing pain and trauma, tortured to her very limits.

However no one would ever expect that somethink as simple as taking over Equestria will soon turn into somethink FAR BIGGER with Nightmare Filly playing major role in it.

However what will happen to poor little Nightmare Moon, will she end up as Mind Slaver puppet or will she escape ? will anyone accept her or treat her as monster ? will she turn into evil mercyless weapon, or will she search new way to live ? will she find friends to help her, or will she find subjects and slaves to follow her orders ?

In this story Nightmare filly will travel to diferent dimentions and timelines, she will have many adventures, she will meet other Nightmare Moons and Twilight Sparkle and her friends more than once, Discord, Changelings, and so much more.
Over her adventures Nightmare Filly will grown up, develop, learn, with guidance of 16 diferent Nightmare Moons in her head, fighting to survive and searching her destiny.