A shocking revelation about the dead Kim Woo Hyun (played by So Ji Sub) has been exposed.

On the 9th episode of the SBS Wednesday-Thursday drama 'Ghost' that aired on the 27th, Park Ki Young (also played by So Ji Sub) is astonished that the dead Kim Woo Hyun had already found the key to blowing the Nam Sang Won murder case wide open.

Park Ki Young had suspected the deceased's wife, Kim Eun Sook, as the murderer, as she had receieved a large payout from her husband's life insurance and opposed an autopsy on the body after the murder. His suspicion only grew upon visiting Kim Eun Sook, who insisted that her husband's death was "clearly due to excessive strain. He was found lying in bed. It must have been a heart attack in his sleep."

However, Park Ki Young soon realizes that her strange behavior stems from being surveillanced, as Kim Eun Sook steps in front of his car after and tells him, "I have something to tell you." He takes her to a remote location where they won't be watched or wiretapped.

Upon being assured that she is no longer under surveillance, Kim Eun Sook reveals that "within minutes of requesting an autopsy, I got a phone call saying my daughter was involved in a collision. It wasn't just that one time. Every time I tried to discover the truth behind my husband's death, someone started a fire or broke in... and that wasn't the end of it."

Kim Eun Sook continues, "I've found bugs and removed them but they would be replaced immediately somehow. For a year after my husband died I've been living under tight surveillance."

When Park Ki Young asks in response, "Is that why you sent your daughters abroad? Why are you telling me this all of a sudden?", Kim Eun Sook replies, "Because you are Kim Woo Hyun."

She reveals that her husband had given Kim Woo Hyun his laptop that contains the evidence pointing to the killer, stunning Park Ki Young.