The story begins with the mysterious murders of the heroine Mu Fei's father and sister Zi Man. The missing twin sister Mu Lin was mistaken for the mastermind of the two cases. However, under the diligent investigation of criminal policeman Zhou Zhenguo and his partner Jiang Hongkai, a bloody conspiracy from a few years ago gradually surfaced, and a little-known love story was also revealed. And as the truth gets closer, everyone involved has unknowingly fallen into an endless whirlpool of darkness. Slowly, everyone discovered that they were the conspirators in the final tragedy. And what is the real killer's purpose?
(There are a lot of mysteries at the beginning of the article, but later on there is the ambiguous love affair between the detective Jiang Hongkai and the heroine Mu Fei, as well as the sadomasochism story between Ajie and Yu hope. It is a mystery romance.)