After the events of the Battle of Equestria, Sunset Shimmer couldn’t really accept the sacrifice of her friend Twilight and Princess Celestia, they were among those who didn’t want us to have manes 6 and princesses use this spell as a last resort, because this one was far too dangerous for those who use it. And his fears proved to be correct unfortunately, for Sunset this victory has a taste of defeat, despite Nothinghness defeated, the Maleficents were going to return and we will have to prepare for the worst in the future and Sunset was motivated to prevent this.
 
A few days after the battle was over, Sunset Shimmer began studying the works of the Canterlot library in order to find a way to bring her friends back as soon as possible. But his research is not very conclusive, in fact despite days and nights of readings with Spike, no work indicates the solution in order to break the spell. For Sunset there is perhaps another place that could help her, the world of humans, with the help of the Equestria Girls, she can surely find the way, alas while she finds herself in the mirror phase, the latter proves useless, Worse he became a mirror like the others, completely emptied of his magic. Sunset Shimmer was overwhelmed, she couldn’t understand why the mirror was no longer working, why she couldn’t join her friends in the human world? Now other mysteries are revealed, but the unicorn is not discouraged.
 
Sunset asks the new Queen of Equestria Luna to create different groups of pony communities that will travel to the lands of Equestria and other continents in order to find a way to free Princess Twilight, Celestia and her friends. After deliberation, his request was accepted without any hesitation, but the groups will have to be reduced to a certain number of individuals in order to avoid being noticed during their travels. On its side Tempest Shadow leaves for Terraold with Flash Sentry and Sandbar, the group of Comet Trail with Lightning Dust and Star Tracker goes to Mythighland while Sunset Shimmer goes with Soarin and Dr Whooves on the land of Equestria.  
Their journeys will last several months for the small group, on the road they discover in old ruins a very precious clue concerning the spell, if ever the stars would shine even more than the others, then the curse will begin to weaken, This will be the beginning of the end. Unfortunately no other indication, the group returns to Canterlot and learns that the group Comet Trail returned earlier from its journey and that the group of Tempest Shadow has disappeared. Sunset announces the news to Starswirl, the little information is very important to him for the rest. But currently the kingdom is stormed by the Maleficents, Sunset decides to take action and this puts in the ranks of the defense of the kingdom in order to protect the inhabitants.
 
One morning, as she watched the sky with Starlight Glimmer and Suburst beside her, she noticed something unusual and had their big surprises, the two unicorns saw stars that became Celestia and manes 6 shone like never before. Finally, by a completely unknown miracle, the spell begins to weaken, they announce in all haste the news to all, after two years of war, the hope begins to be reborn in Equestria, the enemy would begin to weaken at last. What happened? Sunset keeps asking questions. For her anyway, she was happy with her friends, three months after this miracle, she learns that visitors coming from Terraold are heading to Cantrerlot and the group of Tempest Shadow, Flash Sentry and Sandbar accompany them, what do they come to Canterlot? For Sunset to know her friends back safe and sound is news that relieves her, but among these visitors is a very special pony that recalls very bad memories to the unicorn, And she’s going to find that the path to forgiveness is fraught with pitfalls and she’s going to have to deal with it even though it’s going to be very difficult because she’s going to have to deal with her dark past, where that pony has rained nothing but hatred towards her.