A series of murders occurred on a rainy night in Chang'an City, and the dead were all marked with "blood butterflies". The heroine Shen Qingyuan took over the autopsy. The hero Xiao Yan arrived because of the case and questioned the heroine's ability.
The two work together to investigate the case. The heroine uses her martial arts skills to solve the mystery of the corpse, while the hero uses his machinations to gain insight into the forces behind the scenes, gradually forming a tacit understanding. During the process, the male protagonist discovers that the female protagonist is related to the unjust case three years ago, and he feels admiration for her.
The case is intertwined with the old case of the heroine's parents, and the villain's assassination operation is approaching. The two team up to set up a trap to lead out the mastermind behind the scenes, and expose the conspiracy of the powerful and the powerful to tamper with the autopsy results.
The truth of the case is revealed, and the relationship between the male and female protagonists sublimates. The male protagonist is determined to help the female protagonist track down the case of her parents, and the two work together to fight against the deeper dark forces.
Intention: Women and men are equal. Although the truth in the world is late, it has arrived.