The Witness (Mok-gyeok-ja) [Sub: Eng]

One night, there was a loud scream of a woman in the apartment of a person. Sang Hun looked outside his apartment and saw Tai beating the woman with a hammer. The woman was found dead the next day. Sang did not contact the police, but on the following day, the investigator Jay Yup came to investigate the case. Sang Hoon is still conservative on his information and does not tell the investigator Jay Yup what he saw. Sang Hoon must protect himself and his family from the killer, as he insists on mute his testimony.