Gu Yanzhi, a provincial forensic doctor, has been practicing for fifteen years and has dissected thousands of corpses. He can hear the last sounds left by the deceased.
Lu Zheng, the newly transferred criminal police captain, has a hot temper and relies on intuition to solve cases. He is most annoyed by the cold reports from the forensic room.
A strange "spontaneous combustion case in the bathroom" forced the two to partner up. The body of the deceased was burnt, but there was no point of fire in the home. Gu Yanzhi found trace amounts of flammable particles in the lungs of the deceased, while Lu Zheng found a "non-existent person" from the surveillance camera.
The two went from disliking each other to trusting each other, and finally uncovered a serial murder case that spanned twenty years. In the era before DNA databases, murderers used the most primitive means to erase traces; and they could only use the clumsiest methods to find the truth from dust, blood stains, and fibers.
There are no perfect crimes in this world, only evidence that has not yet been discovered.
