After three years, the real Sunset Shimmer has been revealed. And while Celestia plans on helping her out, it will be up the her and only her to fix her mistakes and become the better person Celestia knows she can be.
After the Fall Formal things don't go so well with Sunset Shimmer she slowly spirals downward before hitting rock bottom, moments away from doing something she will regret when, to her, the least likely of people come to her rescue.