Lin Qing, who had high hopes in the demon-slaying family, was deceived by Yun Si in the underworld to gain spiritual power, and signed a life-and-death contract with him without knowing it. From then on, she lost all her spiritual power, grew slowly, and became a laughing stock in the world of demon slayers.
The disdain from her parents and the ridicule from her tribe made her hate Yun Si so much. Ten years later, when the time was right, Lin Qing was ready to kill Yun Si, regain his spiritual power, and live a normal life. But not only did she not want her plan to fail, she also let herself fall into a huge conspiracy.
And Yun Si, the Master Hei Chai who was not killed by him, had long forgotten her existence. He kept her as a time bomb by his side every day, dragging her along to investigate various cases in the human and the underworld.
There are many opportunities, and Lin Qing firmly believes that one day, she will be able to kill him. Can……