'Signal' Cho Jin-woong in the past communicate with Lee Je-hoon through walkie talkie

On the first episode of tvN's Friday & Saturday drama, "Signal", Park Hae-yeong (Lee Je-hoon) found a walkie talkie in a recycle garbage truck parked on the police station parking lot.

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All of sudden, Park Hae-yeong heard a signal on the walkie talkie and heard a voice from Lee Jae-han (Cho Jin-woong), the detective, who had been investigating the Kim Yoonjeong kidnapping case in the past.

Lee Jae-han said, "I'm at the Seonil Mental Health hospital that you mentioned. Inside the manhole at the back alley of the building, there's a strangled body. That's Seo Hyeong-joon's body, the suspect of Kim Yoonjeong's kidnaping case. But the body is missing a thumb. Somebody killed Seo Hyeong-joon and disguised the murder as a suicide".

When Park Hae-yeong heard all the ambiguous words, he asked the man in the past, "What are you talking about. Do you know me? Which detachment are you from" However, Lee Jae-han continue on, "Why did you tell me not to come here. What's happening?", but he was attacked by an unknown man and fell down.

Park Hae-yeong asked back "What do you mean?" but, Lee Jae-han couldn't answer.

Park Hae-yeong just couldn't understand what had just happened. He slapped his own face and tried to get over the strange experience.