Synopsis Korean Drama Signal

Fifteen years ago a female child was abducted on the way to school. At the time, Park Hae Yeong, a primary school student, witnessed the girl being taken away. A few days later, the girl was found dead, and detectives could not find the culprit. Over time, Hae Yeong began to distrust the police. Fifteen years later, Hae Yeong is now a police officer and a criminal. One day, he finds a walkie-talkie with which he can get in touch with Detective Lee Jae Han, who was in the past. Police officers Hae Yeong, Jae Han and Cha So Hyun went on a trip to solve cold cases.
(Source: MyDramaList)

Native titles: 시그널
Also known as: Sigeuneol
Writers: Kim Eun Hee
directors: Kim Won Suk
Genres: Suspense, mystery, drama, supernatural, detective, investigation
keywords: Criminal Profiler, Serial killer, Senior woman / younger man, Change time, Detective, Strong female leadership, Fire accident Rabid dog, Car accident, Hardworking male leadership