Five years ago, a serial murder case was sealed, and a new corpse reappeared with traces of the past. The ex-captain Lu Xiao, who was fired, was forced to return. Forensic doctor Shen Zhao's precise analysis uncovered layers of disguise, the secret evidence of archival maniac Chen Xiu, the deadly clues of black market intelligence dealer Bai Falcon, and the hypocritical mask of current captain Huo Zheng. When intern Jiang Yan discovers that her sister is the seventh deceased, the cold case is no longer an unsolved case, but a bloody epitaph for the entire police force. The truth never disappears, it's just that someone lives to bury it in the ashes.
