Xiao Jinchen, once a genius swordsman and the last member of the Xiao family, lost his family and his meridians overnight, and became a handyman of the Qingyun Sword Sect, suffering all the humiliation. After three years of forbearance, he unexpectedly found the relics of the Xiao family's ancestors - a broken sword and a miraculous book called "The Body Tempering Sword Sutra". This method does not cultivate the true energy. Instead, it uses the body as a furnace and the mind as the fire. It uses ordinary iron to temper the muscles and bones and recast the soul of the sword. Starting from chopping firewood, carrying water, and forging iron, Xiao Jinchen used the most primitive and painful method to reshape his sword skills step by step in unknown corners. When the former genius wields the sword again with a useless body, the whole world will tremble because of him. His sword is not only for revenge, but also to cut off the shackles of fate and ask the sky what justice is.