Sunset Shimmer, the Princess of Valor, is the happiest Sunset in all of the multiverse; A fact that will be painfully obvious to her, when she's cursed to travel the multiverse meeting other failed versions of herself.
Sunset returns through the portal when it opens again, wanting to make amends for the past. However, things get complicatred when she discovers a familiar dark artifact. Lured by a promise of power, can Twilight save her from herself a second time?