On a rainy night, when the thirteenth corpse was discovered, there was a bronze key engraved with the name "Huo Jin" embedded in its chest. Forensic doctor Cen Sha disassembled each corpse with his own hands, only to find his own blood type imprint in the thirteenth body. Both of them are legendary "abnormal case terminators" in the criminal investigation world. One is as silent as a razor, and the other is as rational as frost. When all the corpses pointed to the same unrecorded disappearance, they were shocked to realize that each of them might have been each other's reflection. The heavy rain continued, and the truth whispered among the bones. What Huo Jin smashed was not the corpse, but the past they had forgotten together.