Twilight is turned into an alicorn against her will, paying a terrible price. Now she becomes Equestria's worst enemy, and sets on a journey to uncover her world's greatest secret: The truth behind the nature of the alicorns.
Twilight fights against sinister manipulations, struggling to overcome a deep-seated darkness within. As she battles to preserve everything she cares about, she will sacrifice anything necessary to succeed. But the price of victory may be herself.
Twilight writes to Princess Celestia for an explanation of an insidious issue Shining Armor told her about... but she ends up finding a secret that will change her life forever.