Yoo Seung-mok

After barely surviving a violent attack by an elusive serial killer, crime boss Jang Dong-su finds himself forming an unlikely partnership with local detective Jung Tae-seok to catch the sadistic killer simply known as K.

In Beirut 1986, during the Lebanese civil war a Korean diplomat is taken hostage without a trace. Two years pass and long forgotten, a young diplomat Min-jun receives a phone call proving that the hostage is still alive. With the given mission, Min-jun is sent to Beirut to save the hostage with a bag of ransom money.

After being involved in a traumatic incident, 17-year-old Gong-ju is forced to change schools. Uncared for by her parents, her previous teacher arranges for her to hide away at his mother's place. It takes time for her past to catch up with her, but when it does the revelation is devastating.

In 1987 Korea, under an oppressive military regime, a college student gets killed during a police interrogation involving torture. Government of officials are quick to cover up the death and order the body to be cremated. A prosecutor who is supposed to sign the cremation release, raises questions about a 21-year-old kid dying of a heart attack, and he begins looking into the case for truth. Despite a systematic attempt to silence everyone involved in the case, the truth gets out, causing an eruption of public outrage.