A Long Time ago, The Mane 6 Defeated Nightmare Moon and the Darkness inside Princess Luna is gone.
Or.... was it?
Sweetie Belle comes across piece of that defeated from that night long ago. She decides to keep it. But what she doesn't know is that, the Darkness is still there, waiting for it's next host. Will history repeat it's self? Will Princess Luna help stop the Darkness that once control her?