Gu Ci, an ancient porcelain restorer, hides an unknown secret in her craftsmanship: when she repairs a broken vessel with special nano-metal nails, she can temporarily awaken the object's light and shadow memory of the "past 24 hours". This ability is subject to the cold laws of material science - ancient porcelain from the Ming Dynasty can be traced back at most three days, while traces of enamel from the Qing Dynasty only remain for two days. When a broken piece of jade with strange cracks appears in her hand and the dripping trajectory of the murder scene ten years ago appears, doubts and dangers ensue. Gu Ci teamed up with the stubborn criminal investigation captain Zhang Xiao and the skilled forensic doctor Chen Yanqiu to race against the light and shadow of the fragile artifacts against time to establish an "object scar database", using the bursting speed of the glaze bubbles and the subtle trends of metal corrosion as silent testimony. From restoring the desk to the front of the court, Gu Ci used the curium nail in his hand as the key to not only piece together the fragments of the truth that spanned time, but also opened a new door for "traces of cultural relics" as judicial evidence in the jingle of the ancient curium porcelain.
