After dying on the battlefield in his previous life, a soldier is reborn in another world and awakens the weakest C-Rank Class: Necromancer. But he also gains the forbidden power of Restriction Removal, allowing him to shatter the world's limits. Commanding an ever-growing undead legion, he rises from the very bottom of the class hierarchy and begins his relentless march to become the ultimate ruler—the Sovereign of the Undead.