After decades of silent suffering, an unexpected event causes Luna to reach her breaking point much sooner. Instead of embracing her inner darkness, she makes a very different decision that will change her life in unimaginable ways.
Twilight Sparkle receives a letter from the esteemed Princess of the Night, promising to her that she will reveal the secrets of Nightmare Moon. What she finds out though is a truth that will haunt her forever, and perhaps maybe even the future.
Princess Luna, struggling with the loss of the one closest to her, attempts to re-integrate into society after her return from her imprisonment on the moon. All the while, she fights to cope with a growing envy and burning hatred for her sister.