Chasing a mystery into the past, Twilight finds an Equestria that is different from what she remembers. Will she be able to set history back on track by fixing what didn't happen, or is this Equestria destined to take a different path?
With Sombra dead and his cadets and old friends in tow, Magic Barrier and company try to adapt to the modern world, heading forward to try and make Vanhoover their new home.
Legend has it that on the longest day of the thousandth year, the stars will aid in her escape. There once was a stallion who faced Nightmare Moon and was sealed away with her. Now he returns in the modern age, hoping to find a new path.