Title: 아무도 모른다 / Nobody Knows
Genre: Mystery, Detective
Episodes: 16 (To Be Confirmed)
Broadcast network: SBS
Broadcast period: 2020-March-02 to 2020-April-21
Air Time: Monday & Tuesday 22:00 KST
Cha Young Jin is a detective. She lost her friend 19 years ago to a serial killer. Cha Young Jin still carries guilt and trauma over the death of her friend. The serial killer case then begins again after 19 years. Cha Young Jin chases after the killer.