One Nightmare Night the Cutie Mark Crusaders decide to stay out too late and take a fateful walk down the path to Fluttershy's house at the edge of the Everfree Forest. After getting turned around and wandering for hours, the three find a stranger in the Forest that knows the path back to Ponyville. However, the price to pay is a terrible curse on Sweetie Belle, one that threatens to ruin her life and the lives of her best friends. Despite that, the curse may have a chance to bring the Crusaders closer than ever before.