A bronze dragon head and half a volume of "Yongle Dadian" dragged Cui Henian, the young shopkeeper of Liulichang, into an old mystery. He originally just wanted to be a treasure appraiser, but when he was repairing the fragments and collating a page of postscript, he came across clues that his grandfather had been wronged for "stealing treasure" - the dragon's head was hollow in the belly, and it was unclear whether it was a treasure or a lie; the origin of the woman beside him, Bai Qiang, was a mystery, and she seemed close but yet far away. The fake can be confused with the real, but the real is hidden in ashes. When writing about utensils in the book, it talks about the human heart. Open it and see how a man, following the patina and the fragrance of ink, digs out the truth bit by bit for his deceased father.