This is an inspiring story about master craftsmen of a great nation staying true to their original aspirations and serving their country through their skills. Zhao Tiegang, a skilled fitter, quietly devotes decades to an ordinary job, honing his exceptional craftsmanship. Despite facing misunderstanding and injustice, he never loses his passion for technology or his determination. He repays hostility with kindness and averts a major accident, creating miracles with his own hands. At the national selection competition for the Qimingxing aerospace project, he astonishes everyone with precision far beyond the required standards. Tempted by a million-dollar annual salary overseas, he resolutely chooses to remain in his homeland and dedicate himself to the nation's aerospace industry. Ultimately, the launch vehicle he helps manufacture launches successfully, proving the strength and backbone of the workers of Daxia.