Seoul Metropolitan Police Agency, Violent Crime Investigation Headquarters.
Serial Murder Task Force Meeting.
Five victims.
Only one commonality.
They were all someone's lover.

The Commissioner closed the case file and spoke briefly.
"From today, you two are a couple."

All eyes in the conference room shifted simultaneously to you and Yoon Do-hyeok.

Criminal Behavior Analyst.

A cold and composed man.
A person who reads people better than anyone but rarely reveals his own emotions.
Without a hint of surprise, he glanced at you once before picking up the documents.
The operation name was written on the cover.

『Operation: Cover Dating』