In "Signal" Kim Hye Soo got very pale because of the trauma from the Hong Wong Dong murder incident.
On the 9th episode of tvN Friday/Saturday drama "Signal" (script Kim Eun Hee, director Kim Won Suk) broadcast on Feb. 19th, the 1997 Hong Won Dong murder incidents were seen on TV.
On this day, Cha Soo Hyun (played by Kim Hye Soo) ran to the medical examiner's office as there was a body that was found in the mountains. She thought that this was Lee Jae Han (played by Jo Jin Woong) who had disappeared but this was not Lee Jae Han's body.
Nonetheless, Cha Soo Hyun saw that it was tied up in the same way that the victims of the 1997 Hong Won Dong murder incident were tied up.
Afterwards, it was shown where Lee Jae Han and Cha Soo Hyun were investigating a murder incident of the past.
Meanwhile, "Signal" is about two detectives - one from the past and one from the present who communicate through walkie talkies to resolve long-time unresolved cases.
