Qi Jin personally sent Yu Lin to death row. The evidence was conclusive and was despised by thousands of people. But just before the electrocution started, Yu Lin smiled at him - that smile was like a rusty knife, slowly cutting open Qi Jin's mask of forbearance for eight years. No one knew that the real mastermind of the serial murders that shocked the country had never been arrested. And Qi Jin, as the only investigator who knows the truth, steps on the bones buried by his own hands every step of the way. When the truth surfaced, he realized: Yu Lin was not a sinner, but a sacrifice; and he was the madman chosen to be sacrificed.