In "Signal" the past and the present had switched.
On the 11th episode of tvN Friday/Saturday drama "Signal" (script Kim Eun Hee, director Kim Won Suk) broadcast on Feb. 26th, Lee Jae Han (played by Jo Jin Woong) was told about the serial murderer of Hong Won Dong from Park Hye Young (played by Lee Je Hoon).
On this day, Lee Jae Han heard from Park Hye Young that the culprit was Jin Woo (played by Lee Sang Yeop) and thought about this from the past. Afterwards, Jin Wo was arrested as the culprit of the serial murderer of Hong Won Dong but Jin Woo disappeared from the investigation room. Park Hye Young learned that because of the past, the current reality can change too.
Park Hye Young learned that Jin Woo was in prison and went to see Jin Woo. The surprising thing was that Yoo Seung Yeon (played by Suh Eun Woo) who had been murdered was alive. Yoo Seung Yeon passed by Jin Woo and this was a destined meeting.
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.
