Shen Qingwu, a graduate student in the Department of History, woke up and became a poor student at Jingchao Imperial College. She originally wanted to make a living by relying on modern textual research, but unexpectedly discovered that the history books of this dynasty had been tampered with. All records about the extermination of the family in the previous dynasty pointed to a missing jade seal passed down from the country. And the ancestral sapphire abacus in her hand is actually the only key to unlocking the truth.
Pei Yanzhou, the Minister of Punishment, has his eye on her, Gu Mingzhao, the son of the Grand Tutor, is taking advantage of her, Emperor Zhao Chongguang is watching in the dark, and Chuang Zhou Yanzhi has his own agenda. While Shen Qingwu was preparing for the imperial examination, he was rummaging through piles of old papers for evidence, but found that every time he checked, someone would be the first to silence him. When Liu Ruyan, the survivor of the family murder case, came to the door with a new corpse, Shen Qingwu finally understood: This old account that spanned a thousand years was not only settling the previous dynasty, but also the mystery of her own time travel.
She must be ahead of everyone else and use the sapphire abacus to clear away the fog. Going ashore is only the first step, and surviving to the end is the real skill. But when the truth was revealed, she discovered that Pei Yanzhou's gentleness was a trap, Gu Mingzhao's protection was a deal, and she herself was the 'tamperer' chosen by history.
Refreshing points: the step-by-step counterattack of Kaogong, the overturning of old cases that are linked to each other, and the evenly matched battle of wits. The price: Every truth brings her further away from modernity and closer to death. Suspense: Whose life is hidden in the last bead of the sapphire abacus?
