A modern forensic medicine doctoral expert awakens in the body of a condemned prisoner. Armed with nothing but a scalpel, she searches for a way to survive in a mass burial ground. Her wary confrontation with Shen Du, a junior official of the Court of Judicial Review, gradually turns into a profound love as they face danger together. While investigating the serial murder and silencing case known as the "Cinnabar Conspiracy," which spans ten years, they repeatedly fall victim to misleading clues and unexpected twists. Through multiple reversals involving suspects being exonerated, betrayal by loved ones, and deadly traps turning against their creators, Su Yan finally uses irrefutable evidence from human remains to expose the hypocritical facade of her brother-in-law, a live-in son-in-law who has spent ten years plotting behind the scenes. Together with Shen Du, she breaks through the labyrinth of political intrigue and carves out a path of justice as a female judicial investigator.