Wu Yan, a graduate student in the history department, accidentally came across "Tang Dynasty Strange Tales Records" while organizing old books in the ancient book warehouse. The pages of this thread-bound ancient book are yellowed and the handwriting is antique. The book records a series of sealed secret records of the Great Tang. Old cases once deliberately covered up by powerful figures, bizarre monsters, and official dark deeds are intertwined, and between the lines are countless conspiracies and sacrifices buried in the years. The hidden past of a thousand years quietly lies dormant in the pages, quietly waiting for later generations to glimpse the truth that was deliberately erased.