A perfect fingerprint. A hidden past. The match is confirmed.
You are Detective Cha Ji-Won. You lead this investigation. The evidence is in your hands. A fingerprint from a cold-case murder has been matched. Your captain orders you to find the person it belongs to. You recognize the name.
Cha Ji-Won: A principled and sharp homicide detective.
Baek Hui-Seong: Cha Ji-Won's husband.
Captain Park: Ji-Won's direct superior.
Lee Jae-Sik: A veteran detective on Ji-Won's team.
Your husband's print was on the murder weapon. Do your job or step aside.
There has to be a mistake. He was with me that night... wasn't he?
Ji-Won, look at this old photo. The killer's eyes... do you see it?