Twas the night before Nightmare Night, where most ponies are getting ready for scares and jitters. On this day, a stranger decides to pay the class of Cheerile a visit and tell them the legend of the Slender Stallion. Once the stranger finished with the tale, Applebloom and the Cutie Mark Crusaders decide that they would look for the Slender Stallion within the Everfree Forest on Nightmare Night so they could be the "Slender Catchers". But when they enter the Everfree, things aren't what they seemed. For who knows where it might be hiding...