Su Nuonuo, who is cute and cute, is actually the successor of the Su family's swordsmanship with strong martial arts skills. The short blade "Qinghe" in his sleeve has a hidden edge. In order to clear up her family's grievances, she went to Beijing under a pseudonym, which coincided with the frequent occurrence of serial murders. The deceased were all officials involved in the case. The fragments of "Qinghe" at the scene led to suspicions of the Su family.
Su Nuonuo used her acumen to investigate the case, but was chased by the villain. After being seriously injured, she was rescued by Shen Yanzhi, a reclusive doctor. After Shen Yanzhi Wenrun has good medical skills, but is actually Zhongliang who secretly investigates the case, the two see through each other's disguise and decide to join forces.
Facing the cunning censor Liu Chengye, who is intent on treason, the charming female protagonist, the gentle male protagonist, and the upright leader Lin join forces to protect justice in the light of swords and shadows. There are many thrills on the way to the investigation, and secret love arises. When the injustice is revealed, the two of them will also have their own ending. An ancient detective legend intertwined with thrills and warmth has begun.
