**"Perfect corpses don't lie, but living people do."**
Under the scalpel of forensic doctor Qi Yan, there lay a female corpse with no scars - her skin was as pale as snow, and her lips were frozen in a smile, as if she was just sleeping. The only abnormality was a strand of blue fiber between the nails, which came from some kind of high-end laboratory protective clothing.
Criminal police captain Zhou Linfeng came to the door with the unsolved case files from three years ago. He recognized this kind of death: no struggle, no toxicological reaction, only the heart stopped beating strangely, as if he had been accurately sniped by the god of death.
**"Butterfly Toxin"**-a perfect weapon that can fake natural death is spreading in the shadows of the city.
When the investigation pointed to Qi Yan's father who had been missing for many years, when her laboratory data was successively tampered with, and when Zhou Linfeng discovered that her blood could neutralize highly toxic...
**What they face is not just a serial killer, but a web of evil woven with science. **
——
**"You dissect corpses, and I dissect lies."** He pinched her hand holding the scalpel and pointed the gun at the monitor in the darkness.
**"But this time, what we need to dissect is the truth."**
Concept: suspense reasoning