When Su Jin, a graduate student in the Department of Modern History, opened her eyes, she was transformed into a helpless orphan on a war-torn borderland, suffering from hunger and cold, and her life hanging by a thread.
Ruins are everywhere and corpses are hidden. An old military supply case fifteen years ago involves countless dead souls. The mysterious force "Shadow Master" has laid out a dragnet to smuggle mineral veins, concoct poisonous epidemics, collude with foreign enemies, and secretly eat away at the entire border defense line.
She relied on her knowledge of later history books and criminal investigation ideas to extract clues from dust, scraps of paper, medicine dregs and other subtle clues, and came across Pei Yan, the stern border guard general.
Pei Yan watched the situation coldly, but opened his protection to her alone. The two worked hand in hand to deal with the quartermaster Jiang Zhaomian, the old undercover friend Sheng Yunshu, the hidden secret Xin Shen Qingzhi, and the swinging military doctor Wen Shuyi.
The poisonous smoke of the C-shaped warehouse, the secret caves of Hanshan Mountain, and the secret passages of mass burials are full of murderous intentions. The blood stains of old cases are not yet dry, and new assassinations follow one after another.
Su Jin was alone and weak, relying on only a few scraps of evidence to tear through the huge network of darkness. Pei Yan gave her peace in troubled times, and the two of them guarded the borders and mountains and rivers, and investigated all the grievances caused by cause and effect.
