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.
While trying to conducts test on a possible recipe for a teleportation potion, an alchemist by the name of Streak gets caught in an accident when something goes wrong in his lab. Only to find himself in a place he doesn't recognize.
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.
Absolutely enchanted with her colorful new friends, yet relieved that her little adventure had come to a gratifying end, Sunny decides to spend some time with one of her new friends...