Ling Yue, the chief medical examiner of the modern era, was stabbed by a bronze talisman while dissecting a strange female corpse in 1943. She was reborn as Shen Qingdai, a widower awaiting execution in the Great Jing Dynasty. The moment the knife fell, she awakened the "corpse language" power (reading the corpse's memory), and was still trapped in the time loop of "three days before the execution".
In order to clear up the injustice, she used modern forensic knowledge to conduct an autopsy: she relied on rigor mortis to overturn the conclusion of death, and used a silver needle to pinpoint the Hedinghong poison. However, she encountered repeated obstacles - the evidence was burned, the murderer died suddenly, and even the cooperating guard Xiao Che secretly tampered with the clues. It wasn't until the talisman became hot that she realized that the key to the cycle was "the original owner's injustice" and that she had been involved in the "time cage" conspiracy that spanned twenty years: the female corpse in 1943 had the same appearance as Shen Qingdai, and Xiao Che's wrist also had the pattern of the talisman.
From the corruption case in Qingzhou to the drowning case of a bride in the capital, to the experiment on living corpses in the palace, Ling Yue gradually uncovers the truth: in order to resurrect his lover, the feudal king used the secret of time to create a cage; Shen's mother was the guardian of his daughter, sending his soul to the modern age; Xiao Che is both the illegitimate son of the feudal king and the guardian of the order of time. When time is messed up and her future self returns with ambition, Ling Yue finally realizes: it is never time that traps people, but obsession. She wants to break the cage and let all those who are trapped by obsession find the true way to live.
