As punishment for her crimes, the Elements have cursed Sunset Shimmer to do favors for anyone who asks. Lucky her. And then there's that other Twilight Sparkle she keeps running into...
The princesses gave their magic to Twilight to prevent Tirek from stealing it. As a result, they end up stuck in Tartarus. The fact that things manage to go downhill here says a lot about the wonders of family.
Sweetie Belle comes up with a plan to share a summer's vacation with her friends. Little do the young mares know that their trip will not be quite as they had planned. But when has anything ever happened as they planned?