Binhai City is a modern city with a bright surface and surging undercurrents. A murder case carefully disguised as a heart attack kicked off a series of serial killings. The murderer is well versed in medicine and criminal investigation. Every crime is like a cold mockery of the police. The only signature left is an ancient coin that disappears from the victim's chest. Criminal investigation expert Lu Chen, because the investigation of this case involves his own secret pain - his sister's mysterious death seems to have an eerie resonance with the case at hand. The real suspense is: How does the murderer create a perfect alibi? Where does that missing coin point? And are the memory fragments buried deep in Lu Chen's heart the key to solving the case, or are they a deadly trap carefully designed by the murderer for him?
