Applejack vanishes from Ponyville, Rainbow Dash tries to search for Applejack, with a horrible feeling that something is wrong with all of the ponies that she holds close (even though she won't admit it), including herself. The Mane 6 all are making excuses and balking to help search for AJ. Rainbow Dash's world flips upside-down as she realizes a mysterious pony, with a even more mysterious cutie mark, seems too eager to help Rainbow Dash in her quest. More ponies vanish, and Rainbow Dash has to force herself,for the sake of Equestria, to admit that maybe she had something flesh-crawling about herself.