The Sisters Of Equestria

Three princesses of equestria.....
Two are lost......
And reduced to legends.....
Celestia has to deal with not only the loss of her younger sister luna but her youngest sister melody who was given the task of raising the stars each night nicknamed melody of the milkyways....
the young filly runs away after she witnesses the destruction and jelousy that tore her sisters apart.
Almost a century later melody comes back. With a new companion. Having given up her alicorn wings melody is now just a normal unicorn facing of adventures and earning more about the country the was born to help rule.
As the return of nightmare moon is steadily approaching melody is suddenly plauged by horrid nightmares where her true identity is revealed to her most trusted friend. Only to have him abandon her and dig a hole deep enough in the young princesses heart for her to turn into vortex of the everlasting night.
Will friends be loyal and true like they say?
Will the three sisters ever be reunited ?