Lu Canghai, the sole inheritor of ancient jade-carving techniques, conceals his identity while working as a security guard at a jade-carving corporation. To support his family, he works tirelessly day and night, even developing pneumoconiosis. When Vice President Ma Debiao suppresses traditional craftsmanship, Lu Canghai relies on lost techniques such as Han Dynasty Eight Cuts and Fine Hairline Carving to resolve repeated crises. Turning discarded materials into extraordinary treasures, he unveils the Luban Knife at an international intangible cultural heritage exhibition, defending traditional jade-carving culture with his exceptional skills. Ultimately, traditional craftsmanship and intelligent technology achieve a harmonious integration. Staying true to his original aspirations as an artisan, Lu Canghai devotes himself to passing on his skills so that the thousand-year-old jade-carving tradition can live on through generations.