The film tells the story of a chivalrous man Leng Steel who walks in the dark and is born with the special function of "body metallization". Out of hatred for corrupt warlords and invaders, he was seriously injured in the assassination of corrupt warlords and was reded by the tavern owner. Luo and his daughter Maizi were rescued. The unprecedented warmth of family affection made Leng Gang find himself and decided to return to ordinary life. Maizi has the special ability of "spiritual investigation". The evil forces supported by the invaders discovered that Hongluo was killed to protect Maizi. Leng Steel awakens again with his strong belief in protecting Maizi, destroys the evil forces alone, kills foreign mutants to rescue Maizi, and starts a new life story.