Ling Shuang, a girl from the mysterious organization "Qianmian Pavilion", was treated as a chess piece since she was a child. She is proficient in deception and disguise, but her martial arts skills are mediocre. With a "Symbiosis Gu" that can empathize with people and spy on their emotions, she met Ye Hanchen, the commander of the Department of Prosecution, who was investigating a series of murders, and Murong Che, the erratic young master of the Demon Cult, during a mission to steal a secret map. The three parties competed around a map involving the secrets of the previous dynasty. Ling Shuang walked on the edge of the knife, using information gaps and human calculations, trying to break free from the shackles between good and evil and the court, and find her erased identity. However, she unexpectedly discovered that the truth she was pursuing was inextricably linked to the people around her.
