The centuries-old secret technique of "gold lacquer inlay" that is an intangible cultural heritage reappears, but it leads to a series of murders. Restorer Dai Haoxuan was forced to get involved and found that every ancient artifact pointed to the truth about his father's mysterious death. When the hidden thread emerges, he must use his hands to repair history, use his wisdom to uncover the conspiracy, and complete an ingenious revenge that spans twenty years in the intertwining of paint and blood.