In "Signal" Lee Jae Hoon wanted to tell Jo Jin Woong of the past about the missing person incident but this failed because the walkie talkie didn't work.
On the 10th episode of tvN Friday/Saturday drama "Signal" (script Kim Eun Hee, director Kim Won Suk) broadcast on Feb. 20th, Lee Jae Han (played by Jo Jin Woong) of 1997 talked to Park Hae Young (played by Lee Jae Hoon) and heard that Cha Soo Hyun (played by Kim Hye Soo) was team leader.
Park Hye Young said to Lee Jae Han, "Do you ever wonder what happened to you? Don't you want to know?" Lee Jae Han said that he didn't want to know but Park Hae Young tried to tell him that he had gone missing.
Nontheless, the walkie talkie communication stopped and Park Hye Young was upset.
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.
