Lin Yan, an antiques restorer, dug out a rose key from a wooden box. The red rope was wrapped with traces of time. The word "Gui Yan" in the account book, the residual image of the embroidery workshop in the demolition area, the corners of the cheongsam of the descendants of the Su family... The clues are growing like vines. Which lock is this key going to open? It is the concern of the embroiderer hidden in the flames of war during the Republic of China, the secret that Grandpa never told before his death, and a tender date that spans a hundred years. Lin Yan, an antiques restorer, dug out a rose key from a wooden box. The red rope was wrapped with traces of time. The word "Gui Yan" in the account book, the residual image of the embroidery workshop in the demolition area, the corners of the cheongsam of the descendants of the Su family... The clues are growing like vines. Which lock is this key going to open? It is the concern of the embroiderer hidden in the flames of war during the Republic of China, the secret that Grandpa never told before his death, and a tender date that spans a hundred years.