One night, Celestia is plagued with a horrible nightmare given to her by an ancient being who warns her of an impending danger that will one day destroy the land of Equestria. Fearing the worst, Celestia seeks out this being to discover that there is hope for them. Their only hope is to use the power of the lost element of harmony, lost in another world to keep it safe from evil. Seeking the aid of Twilight Sparkle and her friends, they use the power of their six elements to summon the seventh element to Equestria, bringing its current user with it. Unfortunately, their lives are now in the hooves of a boy who doesn't want anything to do with them or their world. But Twilight and her friends aren't going to give up that easily, together they're going to help their new ally see the wonders of friendship and hopefully find a way to get his element to activate before it's too late.