Locke Breaker is a slave worker in the darkest mines of the Empire. He has no magic power and is regarded as an ant by the nobles. Cassius Silver Flame, the aristocratic magician of the empire, is known for his arrogance and cruelty, and regards non-magic people as "walking waste". In a mining accident, Locke rescued many slave workers with his strong body and explosive talent, but was humiliated and whipped by Cassius in public. Just when Cassius was about to execute Locke with high-level magic, a "magic zero" swept across the entire continent broke out - all magic disappeared instantly, the noble mages were reduced to useless people, and Locke clenched the mining pickaxe in his hand.
When magic loses its effectiveness, true power awakens. Locke used the steel and iron bones forged in the mines and precise blasting skills to crush the old nobles from the bottom of the world step by step in a world where magic collapsed, and shattered the iron-blooded order where magic was supreme. He is not a hero, he is an avenger who crawled out of the mine.