Arios Verheis, a young demon who lacks magic unlike other demons, desires to become a Demon King surpassing the previous generation\'s Demon King. Arios is belittled by his own kind. However, one day he discovers a forbidden technique and an ancestral demon sword that enables him to awaken his true power. Arios rises as the strongest magicless demon, but many people still refuse to accept the fact that Arios is the strongest demon in the Abyssal Realm. Will Arios succeed in becoming the Demon King?