In the dawning years of the Equestrian Golden Age, the Royal Scientific Board is granted a contingent of military units to spend a five-year expedition into the Everfree Forest in search of ancient ruins from before the Alicorns took reign over the Equestrian Empire.

However, their expedition turns when the discovery of a supposed fictional species brings the expedition to an immediate halt. But how exactly have these creatures been living in seclusion when their own civilization was nearby? And how exactly have they survived in such a hostile land?