In "Signal" Kim Hye Soo tried to help Jo Jin Woong with his investigation only to put herself in danger.
On the 9th episode of tvN Friday/Saturday drama "Signal" (script Kim Eun Hee, director Kim Won Suk) broadcast on Feb. 19th, Lee Jae Han (played by Jo Jin Woong) started to investigate the incident of Hong Won Dong by himself.
On this day, Lee Jae Han thought of all the similarities between the victims of this incident and went ahead to find the culprit. He saw that all of the victims would move while listening to music with their earphones and was surprised.
Lee Jae Han briefly sat at this desk and fell asleep. Cha Soo Hyun (played by Kim Hye Soo) saw the records that Lee Jae Han had written and started to undergo an investigation alone to help her.
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.
