A long time ago, there used to be three main pony species; the pegasi, masters of the sky, Unicorns, students of Magic, and normal ponies, strong, durable, and workers of the earth. Above them the alicorns ruled, for a time. Eventually, the pegasi and unicorns vanished and faded into obscurity, and with them, the alicorns; leaving the earth ponies to themselves. These eventually were to be viewed only as myths. But the alicorns still watched over Equestria. Sometimes they would disguise themselves as normal ponies and have children, who would go on to influence history, but the alicorns forever lurked in the shadows.

Luna is tricked by her sister into having a foal. She chooses her best friend from over 1000 years before.

However can she get around the oath that she made to remain pure?