Zhou Heng transmigrates into a fantasy world, where his clan frames him and condemns him to slavery at the Blackstone Mine. Using his modern geological knowledge and military strategies, he rises from the brink of despair, gathers the mine slaves, and establishes the Blackstone Battalion. He deploys battle formations and slays powerful monsters, transforming from a worthless slave at the mercy of others into a formidable regional warlord commanding his own army. While investigating the truth behind his younger sister's abduction, he uncovers a shocking conspiracy involving corrupt border officials colluding with the demon clan. He ultimately wins the final battle and successfully rescues his sister, only to receive an imperial edict demanding that he answer for his crimes.