When somepony from Celestia's and Luna's past has returned to Equestria, he has his mind set on two things: power and the Elements of Harmony. Twilight, Pinkie Pie, Rainbow Dash, Applejack, Fluttershy, and Rarity are left with no choice but to go into hiding. With many questions unanswered, Twilight must discover the truth behind Stallion X and stop him before it is too late. Friendships will be tested. Secrets will be revealed.