After Discord had been defeated, everything returned to normal. Except for one building. One building at the edge of Ponyville that has remained lifeless. Celestia left it alone, thinking it will be fixed eventually. But after the changelings tried to invade, she sends Twilight and Spike to investigate. They find a mirror that leads to another world. Another world where every mare is a colt. Another world with something strange is beginning to arise...... Edited by Camlio.