In "Signal" Kim Hye Soo was part of the In Joo incident and reinvestigation.
On the 13th episode of tvN Friday/Saturday drama "Signal" (script Kim Eun Hee, director Kim Won Suk) broadcast on Mar. 4th, Cha Soo Hyun (played by Kim Hye Soo) was definite that Ahn Chi Soo (played by Jung Hye Kyun)'s death was related to the police offiers.
On this day, Cha Soo Hyun saw that Ahn Chi Soo had been connected with the death and saw that Kim Sang Beom ran away. He knew that Kim Beom Joo (played by Jang Hyun Sung) would be related to this. Ahn Chi Soo wanted to reveal the truth about the In Joo incident and suffered death. Such is because the person who had been taking are of the In Joo incident was also Kim Beom Joo.
Cha Soo Hyun also persuaded the team members and started to look for Kang HyE Seung, the female student who had been the victim. Park Hye Young learned that Kang Hye Seung was still getting treatment for depression and started to investigate all the hospitals in the nearby region. Then, he found that there was a woman who had gone out of her way to avoid any and all contact with men.
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.
