In the aftermath of the wedding, Twilight has found that her friends have grown... distant, and to make matters worse, she cannot rest for fear of a dream that she cannot remember. When it all comes crashing down, the night will fall.
An ancient human who has taken it upon himself to maintain balance throughout dimensions becomes ensnared in the realm of Equestria, with nothing to help him combat the struggle on the horizon except for his god-like alien tech, the Universal Editor.