Three years after her imprisonment on the Moon ended, much has happened to Princess Luna. She had the luck to fall in love with a mortal stallion who went and died before their second anniversary - leaving the moon princess pregnant.
Sheltering the foal from the outside world, Luna and her family (Celestia, Cadence and Twilight) do all they can to ensure the filly is safe and happy, but prepared for a future as princess.
Fate has other plans …