Chi Xiao, a young man with mechanical prosthetic eyes, awakened the power of the blood jade pendant during the "Stigmage Purification Ceremony" and discovered that he was actually the inheritor of the "Original Bloodline" who was being hunted by the Holy See. Relying on the memory of an arms expert in his previous life, he integrated the "Burning Sky Fist Book" with the core of the federal mecha to create the "Fist and Fire Resonance" combat mode.
When Chi Xiao learned that his sister had been captured by the Holy See and taken to the "Gene Furnace" for experiments, he resolutely sneaked into the "Rewu Research Institute" of the Black Iron Federation. In the process of cracking the genetic lock, he accidentally activated the bronze sundial left by his father and saw the truth about the revival of spiritual energy three hundred years ago - the so-called spiritual energy was actually the energy shackles used by alien civilizations to imprison the earth.
As the "moment of annihilation" approaches, Chi Xiao leads the Anxu tribe to raid the Holy See headquarters. He holds Gatling in his left hand to pour ammunition, and uses his "Bearing Bone Fist" in his right hand to detonate spiritual energy crystals, splitting space cracks between fists and fire, leading directly to the "Battlefield of Gods and Demons" of the alien mothership. In the end, Chi Xiao destroyed the alien energy core at the cost of burning 360 acupoints in his body, but found that his sister's genes had been bound to the laws of time and space, becoming the "living key" to maintain the balance of the world...
