The heart appears on the twenty-first day. Around the thirtieth day, it begins to beat, never stopping again until death.
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Shencheng, southern Henan. A rainy, dreary late autumn.
Two male corpses are discovered in a secluded alley in the old city, disemboweled, decapitated, and dismembered, with their organs scattered across the ground. The brutality of the scene is enough to make even a veteran homicide detective blanch.
The city public security bureau quickly seals off the scene, but the night rain and the crowd of onlookers have already contaminated it.
Even more unsettling, news of the case spreads far faster than usual. Some people who should have no interest in it are also asking around.
As the investigation deepens, police squad leader Hu Deqiang uncovers a few clues. Just as he is about to pursue them further...