Aaron Stern, once the celebrated Kirin Prodigy, falls into disgrace when he fails to contract a Sword Spirit. Instead, he binds the cursed Ruby, one of the four Magic Swords, which awakens the Aegis System. As the Voidborn Cataclysm looms over the world, he rises from waste to become the Sword God. Yet, right before he prepares to face the impending disaster, he discovers a shocking truth about the nature of the Voidborn itself.