Sunset Shimmer, practitioner of friendship, twice savior of Canterlot High, alicorn. She's offered to help Twilight's new student as the whole group travels to the Crystal Empire for a Crystalling. Should be a relaxing, stress free trip. Right?
When a pony dressed as Mare Do Well leads a rebellion against Celestia, Twilight's friends are taken prisoner and are interrogated over the events of the Invasion, as well as other recent events. Can Twilight find a way to save her friends?