In "Signal" Son Hyun Joo threatened Jang Hyun Sung.
On the 14th episode of tvN Friday/Saturday drama "Signal" (script Kim Eun Hee, director Kim Won Suk) broadcast on Mar. 5th, Kim Beom Joo (played by Jang Hyung Sung) tried to persuade Lee Jae Han (played by Jo Jin Woong) but such persuasion didn't work.
On this day, Kim Beom Joo felt very nervous that Lee Jae Han knew the truth about the In Joo incident. He was afraid that Lee Jae Han would reveal the fact that the actual culprit of the In Joo incident was the nephew of Congressman Jang Young Chul (played by Son Hyun Joo).
At this, Kim Beom Joo went to see Jang Young Chul and when Kim Beom Joo was going crazy, Jang Young Chul was calm and started to cook meat.
Jang Young Chul was cooking meat and said, "You know, meat is best when it's from Japan. Why do you think this is so delicious? You need to guarantee quality from when they're a calf. You need to play music for it in case it gets stressed and regularly give it massages too. It's living a good life. What do you think the reason is to do this? It's to grab it and eat it" he said, threatening Kim Beom Joo.
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.