Su Yan, an ancient book restorer with the ability to recall memories, frequently dreamed of the owner of the diary, Shen Qingci, a famous opera actor during the Republic of China, when he was restoring an old diary from the Republic of China. As her recovery progressed, she discovered that her life trajectory closely overlapped with Shen Qingci's, and the unfinished obsessions in her diary were leading her to find the truth through dreams.
Main plot: Su Yan meets Lu Zhixia, an architect who looks the same as Shen Qingci's best friend in her dream. The two met because of an ancient book protection project. During the interaction, Su Yan's ability to look back often got out of control, bringing the two people into scenes such as opera gardens, rainy nights, and old houses in the Republic of China, to witness the deep love and regret between Shen Qingci and her best friend. As the truth is revealed, Su Yan discovers that he is the reincarnation of Shen Qingci's soul, and Lu Zhixia is the reincarnation of his best friend. The encounter between the two is a fateful redemption that spans a hundred years.
Purpose: Taking the fateful encounter between the two heroines spanning a century as a clue, through the professional perspective of ancient book restoration and architectural protection, it shows the eternal value of Chinese cultural heritage, interprets the theme of "deep love can transcend time, and the spirit will eventually echo", and conveys the power of mutual redemption and common growth between women, as well as the contemporary mission of guarding the roots of civilization.