Shen Zhu is a talented artisan of glazed light lamps, but she is trapped by past pain, her hands trembling frequently, leaving her barely able to maintain her old shop in the old street. Her fiancé, Lu Yu, urges her to give up her craft and get married, but harbors other motives in his heart, planning to take advantage of the district renovation to circulate precious intangible cultural heritage collections. Meanwhile, a glazed light heavenly lamp crafted by Shen Zhu herself in her youth transforms into a youth named Liu Guang, who becomes her disciple and companion, helping her heal her trauma. However, Liu Guang's power is fading; he leads Shen Zhu to see the cruel truth in the intangible cultural heritage secret realm: if craftsmanship is lost, spiritual rhyme will dissipate.