There are those who are born monsters, but there are also those who are made into monsters by people.
Detectives from the present and a detective from the past communicate via walkie-talkie to solve a long-time unsolved case.
Seasons
Trailer
![[#시그널] 6분 하이라이트! — watch on YouTube](https://img.youtube.com/vi/JnX9ctyNrAI/maxresdefault.jpg)
[#시그널] 6분 하이라이트! · Opens on YouTube
