Xuan Qingjing tells the story of Lin Zheyue and Wen Nanzhi who were forced to step into the dark side as past events and confusion intertwined. They began to trace the truth from an abnormal object, but gradually discovered that the cracks in the past were far deeper than imagined. As clues continue to emerge, fate, betrayal and protection are intertwined, and a crisis involving choice and truth is approaching.