A detective who was wronged and reborn was trapped in the archives room, but he discovered the fatal mark of a future serial killer from the fingernails of the deceased in an "accidental" fall case. Under the double siege of bureaucratic strife and the lurking real murderer, he must race against time, use technology, memory and courage to tear apart the disguise, restart the dusty murder case, and be startled step by step in revenge and protection.
