Cheon Yeo-Woon has spent his entire life being ignored or getting bullied inside the Demonic Cult, surviving as an unwanted descendant with little hope of ever changing his fate. Everything shifts after a stranger claiming to come from the future suddenly appears and injects a tiny machine into his body before disappearing. A voice immediately begins speaking inside his head, introducing itself as a Nano Machine. Yeo-Woon, raised in a sect that worships the divine Mashin, mistakes it for the legendary being of his faith. The misunderstanding is almost absurd, yet from that moment, his hopeless life begins heading in a completely different direction.