When one fateful search through the Everfree Forest leads Rarity to a secret library inhabited by the spirit of an ancient alicorn princess, she realises that it may be time to start believing in fairy tales.
When an accident leaves Twilight Sparkle seriously ill, Applejack, Rainbow Dash, and Rarity must undertake a perilous journey to find her a cure. What adventures await them beyond Equestria's borders?