Long after the creation of the Lunar Republic, and peace talks between Equestrian and the Lunarians are completed. An older, aged Luna and Celestia reminisce over their youth. Many Prank wars were had, and many foal-sitters were chased away. But as the reminisce, shadows of the past are also remembered. And a tale of ten thousand years, is revealed.
(Set in the A New Equestria Universe, before Celestia formed the Knight's Templar.)