1,000 years ago, the Elements of Harmony were used to seal away the corrupted Nightmare Moon. However, one alicorn using the purest and most ancient magical power known to Equestria against her beloved sister shattered their connection with the Elements. Over the course of that millennium, without the power of the Elements to guide them to happiness, one by one the ponies of Equestria began to lose faith in their remaining princess and grow more and more discontent. In the present, there are six new bearers of the Elements, and Harmony has been restored. But it is too late. The seeds unknowingly planted 1,000 years ago are finally growing to maturity, and all of Equestria is faced with a growing crisis as the dissatisfied ponies unify and speak out for the first time. When Princess Luna vows to take these ponies under her wing and leave Equestria with them for the moon, Rainbow Dash makes an impulsive decision that will change everypony's life forever.