Library

Su Wan, a modern girl, discovers a stack of letterheads from the Republic of China in the old bookcase left by her grandfather. After the letter was stained with her blood, it suddenly "activated" and drew her into the vortex of time and space. When she opened her eyes again, she had traveled to Shanghai in 1928 and became Shen Zhiyi, a female student in the Republic of China. The author of the letter was none other than Shen Zhiyi, and there was concern about her family hidden between the lines: she suspected that her brother Shen Tingzhi was doing shady things through "Shen Ji Foreign Trade", and she even left a warning, "Don't trust Shen Tingzhi." Under Shen Zhiyi's identity, Su Wan adapted to life in the Republic of China while following the clues in the letters and diaries, and soon discovered the secret of Shen Tingzhi secretly selling arms, and his grandfather's name actually appeared in the old account books, which seemed to be secretly related to this period of history. As more letterheads are "unlocked" at specific moments, Su Wan not only has to search for telegrams and collect evidence under Shen Tingzhi's surveillance, but also uncover the past ties between his grandfather and Shen Zhiyi. The letter across time and space is both a guide and a shackle - can she fulfill Shen Zhiyi's instructions and prevent the family tragedy buried by time? Can we find a way back to modern times in the cracks of history? The secrets of the old bookstore, the fog of foreign trade in the Republic of China, and the intertwined fate of the traveler and the original owner, all started from this stack of faded letterheads and slowly unfolded.