It was supposed to be a simple task: drop Cerberus off at the Gates of Tartarus, the prison doors for Equestria's greatest and most terrible monsters. Little did Twilight know it was host to an entirely different prison: the SCP Foundation.
Twilight is enthralled with the sheer amount of knowledge and power the Foundation contains. They are likewise willing to bring her on board. After all, who can stop a black ops facility that doesn't officially exist?
Celestia, if she has any say in the matter, and she promised there would be hell to pay if the Foundation harmed her student.
The SCP Foundation gives you long hours, low pay, a high chance of death, and treasures blacker than our hearts. That is the price of knowledge, Twilight. You may have all our secrets. All we ask for is your soul.
Why does Equestria seem so peaceful? Because it's our job to lock up all the monsters. Behind our walls lie demons, darkness, and all the keys to set them loose. Welcome to the Foundation.