Yellowed letters drifted from the Republic of China to modern times. Auction house appraiser Chu Huaixu and ancient book restorer Ruan Shuyao met because of a mutilated love letter. The farewell words from "Jingran" to "Qingru" in the letter hide an unsolved mystery that spans more than eighty years - in the tears stained by the handwriting, is it a rumor of betrayal, or is it involuntary in the midst of the war?
Ruan Shuyao uses his fingertips as blades to peel away the truth from the moth-eaten rice paper: the faded stamps point to the old alleys of Suzhou, the cinnabar seals hide the passwords of the libraries, and the secret handwriting reveals the secret protection under the iron heel of the Japanese army. While Chu Huaixu was following the clues, he was shocked to realize that the "heartless person" in the letter, Jing Ran, was actually his grandfather, who was regarded as a hero by his family.
The process of repairing the letters became an emotional undercurrent for the two of them. From the tit-for-tat confrontation to the touching of fingertips, from the carvings in the attic piano room to the first snow in Beihai Park, in their dialogue across time and space, they understood the forbearance and tragedy of love in troubled times. When the last unsent letter was rediscovered, it not only restored the dust-laden sincerity, but also made two people who were burdened with the family's past understand that the best repair is to let regrets be forgiven and love finally echo.
