Three years ago, her partner Lu Zhi died while hunting a serial killer, with only a white rose among his belongings. Three years later, the bouquet of white roses began to appear at her door every day - the packaging method and the method of removing thorns were exactly the same as those on the scene. Shen Zhiyi tore out the first flaw from the fiber of the flower stem: the person who sent the flowers turned out to be a supplementary credit card that had never been activated after Lu Zhi's death. The cards of the dead are consuming, and the names buried in the archives are beginning to breathe. She followed the scent of flowers into a maze called Lincheng, but she bumped into the man who was supposed to be lying in the funeral parlor, smiling at others and saying "relax". The cold-hearted psychological expert single-handedly tore open the criminal network "Hua Zhan" wrapped up in charity auctions and flower salons, used micro-expressions to dissect lies, and identified the murderer based on the dehydration curve of a flower. When the whole world urged her to receive treatment, she chose to hunt in reverse - until the last bouquet of white roses was finally signed.