I know this is long overdue but I had to do a write up on this because I really enjoyed it a lot.
First of all, I am impressed at how OCN always delivers their crime/thriller dramas so well. And their newest addition to it is Tunnel.
Basically, it’s about how Park Gwang-Ho, a detective, who accidentally travels through time (to the future, 2017) while chasing a serial murderer. There he meets Kim Sun-Jae, his previous partner, Sung Sik, and Shin Jae-Yi and they work together through a series of crimes, while trying to find the serial murderer of the past.