Most ponies fear the Everfree Forest but why? Some speak of dangerous monsters that call the dreaded forest home while others tell of unnatural happenings and supernatural occurrences but all are unaware of the real truth. A closely kept secret that only Princess Celestia and a few trusted individuals keep locked away in their memories.
The Everfree Forest as ponies know it didn't exist before. It did not 'magically' appear and start churning out monsters in the middle of the night. The Everfree Forest was not made naturally as most have thought. It was pony-made. Most ponies would instantly dismiss this notion as pure crazy talk but is it now?
The Everfree Forest used to be like any other forest. Woodland creatures would frolic through the grass and the trees would grow straight and healthy but Princess Celestia had other plans. With the aid of the best scientists and architects, she began construction of a deep underground facility underneath the forest.
In the underground complex itself, it has everything a self-sustaining city would need: underground farms, modern amenities, barracks, laboratories, control rooms, power stations, mess halls, recreational areas, movie theaters and of course, a nuclear warhead. In case any of the creatures break free of its containment area and the situation can no longer be defused, the nuclear warhead will detonate and destroy the whole facility as well as the Everfree Forest itself.
But what could they hope to gain by constructing such a facility? Beyond Equestria lies various other dark and unknown kingdoms and lands, their intentions unknown. Equestria is a rich country, filled with prosperous land and hoards of treasure which of course, naturally attracts other countries to try their luck in an invasion. But invading conquerors are not the only threat Equestria faces.
Strange and powerful creatures like Discord and Queen Chrysalis often conduct terrifying plots and evil machinations to further their schemes and destroy Equestria. Some of these nefarious villains have a long and bloody history with Princess Celestia. Some of Princess Celestia's enemies date back centuries and they are not to be trifled with. Even Celestia herself is worried of the more powerful of her enemies threatening Equestria. They wait in silence, biding their time and power, in the lands beyond. Waiting for the opportune moment to spring their plans into action.
But Equestria possesses a terrifying weapon that deters even the bravest of villains: The Elements of Harmony. But what if the Elements fail? What if the bearers fall before the might of Equestria's enemies? That is what the secret facility was built for. The best scientists, physicists, weapon experts, engineers, technicians, wizards and computer experts were brought together to construct dangerous weapons with which to combat Equestria's darkest foes. Robotic killing machines, biological weapons, cybernetic supersoldiers, massive weapons of mass destruction, powerful creatures and various others were created within the confines of that facility.
But what happens when the creations turns on its creators? What happens when the very beings built to protect Equestria decided to destroy it? What happens when apocalyptic creations threaten to break loose?