Celestia and her sister, Luna have finally been reunited with their dearest little brother, Prince Astrello. For more than a thousand years they hid behind masks, hiding their true feelings. Celestia and Luna decide it is time that Astrello met them.

A unicorn mare that has yet to have any real adventures of her own, soon finds herself in one. Helping out the Princesses, the unicorn mare comes an old photo album of the Princesses. From there, well you'll just have to see.