The Southern Witch clan was wiped out, leaving only one holy lineage. The chess player behind her helped fuel the flames, and her life experience reappeared. Only then did she realize that she was the Saint of the Southern Witch, and named her Wu Xin.
Wuxin makes a deal with the ghost master of Guiyu City. The two have their own agendas and use each other. Everyone is a pawn on the chessboard, unable to struggle.