Its Halloween and Applejack and the other elements of harmony go have a visit to the castle of the 2 sisters, Applejack finds the Curse of Evil book that Luna used to turn into nightmare moon. When she takes the book home without consolting Twilight or the others, she soon finds herself reading a page and becoming evil. With each page she reads the more evil she gets. Its a race against time. Will the girls save applejack or will Equetria fall under to a new leader? Find it out in The Book!