In the early years of the Republic of China after the victory of the Revolution of 1911, Shen Biyun, a talented woman from Jiangnan, married into the Xuan family, the owner of the library, at the risk of her lifelong happiness, in order to realize her ideal of entering China's largest private library to read books and fight for the right of all students to study, and to investigate the murderer of her father. However, she fell into the intrigue and power struggle within the Xuan family, encountered many crises, tasted the warmth and coldness of human feelings, and experienced life and death several times. The Xuan family also experienced catastrophes again and again, until the family was broken up and people died. Biyun remained unswerving. With the help of Xuan Xiaoji, the fourth young master of the Xuan family, and Wu Shi, a progressive youth, she saved the Xuan family with strong faith and extraordinary wisdom, became the new head of the Xuan family, and found out the real murderer and avenged her father. In the end, Shen Biyun broke through the feudal ancestral system and opened the library, so that students including Biyun could go up to the building to study.