Ji Chenzhou is best at making dead people speak, and Xie Wujiu is best at making living people lie.
Seven years ago, one of them was a family member of the deceased in the White Tower fire, and the other was the only suspect wanted in the city.
Seven years later, Line 13, which had been out of service for a long time, re-entered the station at midnight, and the electronic screen only illuminated one sentence:
[Please ask the two suspects to prove each other's innocence.
Rule One: One man lies, the other bleeds.
Rule 2: When one dies, another is buried with him.
Rule 3: The real murderer must be chosen from among them before dawn.
Everyone was waiting for them to identify each other.
Ji Chenzhou pushed the only way to survive to Xie Wujiu: "You go first."
Xie Wujiu smiled and tore off his witness card: "Sorry, I only testified for him."
It wasn't until pages of deleted testimony reappeared that Ji Chenzhou discovered: the person named as the murderer seven years ago might have never killed anyone, and the deceased he had always wanted to save might not have died at all.