Interpol Zhou Mu investigates a murder case of a wealthy man and discovers that the fingerprints at the scene belong to an old man who was cremated three months ago. Subsequently, many criminals died mysteriously, leaving behind the fingerprints of the deceased. All clues point to Liu Shen, the body beautician of Yong'an Funeral Home.
The investigation revealed a dark transaction from 20 years ago: the funeral director colluded with the current deputy director Lu Zhenguo to sell organs, and abused young Liu Shen for a long time. Liu Shen endured it for many years, collected the fingerprints of the deceased as weapons, and designed a revenge ritual in which the "fingerprints of the deceased" were used to judge criminals. Finally, he forced Lu Zhenguo to plead guilty, and after uploading all the evidence of his crime, he walked into the incinerator to sacrifice himself. The dusty crime was finally exposed, but Liu Shen only left a glowing fingerprint on the inner wall of the freezer to prove his existence.
