It is 5 years since the defeat of Discord and Equestria is enjoying prosperity and peace under the young Alicorn Sisters. However, fractures are occurring in the sisters bond and a new enemy is surfacing to take advantage of the situation.

Follow the story of the Nightmares, a secret branch of the Equestrian government. And Night Wing, a young Royal Guard Cadet. Does he have what it takes to be a Nightmare and help defend Equestria.