He is a hero, but he looks like a monster. He is a guardian, but he doesn't hesitate to take lives. He brings peace to the innocent, but sheer terror to everyone. He is the Vigilante, a merciless warrior assumed to be from Tartarus itself.

Will Equestria be able to rest easily when they know that there's someone, or rather, something on the loose that could easily kill them all without question? And just what kind of monster could possibly be hiding behind that mask?