A series of murders occurred in two provinces and three places, and the identities and experiences of the deceased were unrelated to each other. The murderer came and went without a trace, and the police were helpless.
Who is the murderer? What is the murderer's purpose? What kind of revenge are they planning?
How a criminal investigation model who retired to the countryside and a fledgling police academy graduate peeled off the cocoons to find the truth behind the case.
Justice cannot be served through legal means,
Faced with unstoppable power,
A high-IQ showdown breaks out immediately!
Concept: Who is the murderer? What is the murderer's purpose? What kind of revenge are they planning?