Five years ago, Xiao Zhan was betrayed by his close relatives and imprisoned. His spine was broken and his whole family was brutally wiped out. When he returned from hell wearing a mechanical prosthesis, the nanorobots flowing in his body engraved revenge into his DNA - crushing the enemy's conspiracy with high-voltage current, and harvesting the criminal's head with mechanical spurs. From the bloody container at the coastal dock to the genetically modified underground laboratory, Xiao Zhan gradually uncovered the truth about Mr. Hong's "Perfect Warrior Plan": his sister's ashes actually became the mother body of the clone army, and his own genes were modified into nuclear explosive weapons! When the whole city was shaking in the mechanical gears, the man who emerged from the genetic cage was writing the final verdict with bullets: "I, Xiao Zhan, am revenge itself!"
