Former forensic doctor Shen Zhiyao, who was reviled by the entire Internet as the real culprit in the serial murders, heard an unnoticed cry for help in the last words of the deceased. She used her anonymous identity to decipher the code of her last words word for word, and was involved in a series of murders. Criminal investigation captain Lu Zhaoheng had to join forces with her again in order to find out the miscarriage of justice that year. The dark secrets hidden by relic organizer Jiang Suining, undertaker Lin Hesheng, and writer Zhou Yanqiu are emerging with every last word. When the truth begins to bite back, who is the real murderer?