Chen Wuji, a master of traditional intangible cultural heritage blade forging, has devoted himself to preserving the ancient techniques of Tang Dao craftsmanship. Working quietly as a security guard at a company, he secretly protects this traditional art. By a twist of fate, he uses the long-lost Dragon Scale Edge-Covering technique to restore a precious meteorite iron Tang Dao, astonishing the entire blade-forging industry. Despite the challenges posed by foreign blade-making techniques and the doubts and criticism of those around him, he never abandons his original mission: to pass down China's intangible cultural heritage of traditional forging. At an international blade-forging competition, his thousand-year-old craftsmanship and ingenuity help him overcome countless obstacles, as his forged Tang Dao defeats foreign blades. The ancient Tang Dao craftsmanship earns worldwide recognition, bringing in numerous export orders and prosperity to traditional artisans. Chen Wuji welcomes a large number of apprentices, ensuring that this thousand-year-old intangible cultural heritage will continue to thrive for generations.