In a post-apocalyptic borderland where demons are rampant, the craftsman Huo Mu, who is born with weak hands, is bullied. In despair, he activated the mysterious "Synthetic System of All Things". With the first short blade made of scrap copper and iron, he started the road of survival in the apocalypse. Faced with the recruiting schemes of monsters, the nobles of the capital, betrayal and cold arrows from people's hearts, he built the mecha "Qingji Armor" in hiding, took in the refugees, and formed his own force. When the monster army pressed on the territory, the game between him and the orphans of the previous dynasty, local powerful people, and the imperial army became more and more intense. This is the story of a sickly young man who, relying on his system, resourcefulness and a compassionate heart of guardianship, set out on the ruins of troubled times, using forged iron as armor and a benevolent heart as a sword, to embark on the road of guardianship and rise.