Exactly ninety days have passed since Sunny Starscout did the impossible and reunited ponykind. Once her lighthouse is rebuilt, she finds an old book in Bridlewood, and discovers that a pony has been watching all along.
Sunny Starscout's ongoing search for Equestria's ancient past sends her up to the northern arctic, where it is written that a city protected by love once stood.
After their history-making adventure, Sunny decided to travel further with her friends to solve Equestria’s ancient history. However, they didn’t expect to meet a resident from the world’s past.
A human teen robbed of his home and species. A world of magic and friendship facing an unseen foe. And an experiment that could put the whole Universe in danger.