Su Jin, a modern graduate student in history, opened her eyes to find herself in a war-torn frontier, an orphan with nowhere to turn, starving, freezing, and at death's door.
Ruined walls and hidden corpses were everywhere. An old military-supplies case, sealed away for fifteen years, implicated countless dead souls. A mysterious force known as the “Shadow Master” had laid a vast web of traps, smuggling ore, manufacturing poisonous plagues, and colluding with foreign enemies as it secretly gnawed away at the entire frontier's defenses.
Drawing on her knowledge of history books from the future and her forensic investigative instincts, she pieced together clues from details as small as windblown sand, scraps of paper, and medicine residue. Along the way, she met Pei Yan, a stern, cold-eyed general guarding the border.
Pei Yan watched the situation with a cool gaze, yet opened his arms to protect her alone. Together, they faced the military supply officer Jiang Zhaomian, the old friend Sheng Yunshu working undercover, Shen Qingzhi with secrets hidden within her, and the wavering military doctor Wen Shuyi.
Poisonous smoke in Warehouse B, a secret cave in Hanshan, and a hidden passage through a mass grave: deadly threats closed in from every side. Blood from the old case had barely dried when a new assassination attempt followed.
Though alone and vulnerable, Su Jin used a handful of surviving evidence to tear apart a vast web of darkness. Pei Yan gave her a life of peace through the chaos, and together they guarded the frontier and uncovered every cause and injustice.
