Title: 터널 / Tunnel
Genre: Detective, Crime, Thriller, Fantasy
Broadcast network: OCN
Broadcast period: 2017-March-25 to 2017-May-21
Air time: Saturday & Sunday 22:00 KST
In 1986, Detective Park Kwang Ho (Choi Jin Hyuk) desperately tries to catch a serial killer. He chases after the serial killer and goes through a tunnel. On the other side of the tunnel, Detective Park Kwang Ho finds himself in the year 2017. The serial killer has resumed the killings that began 30 years ago. Detective Park Kwang-Ho works with Detective Kim Sun Jae (Yoon Hyun Min) and Professor of Criminal Psychology Shin Jae Yi (Lee Yoo Young) to catch the killer.