Can detectives in the past and present work together to capture an elusive serial killer?
Police lieutenant and expert criminal profiler Park Hae Young (Lee Je Hoon) once witnessed the kidnapping of a classmate in his childhood, but his testimony was rejected by the police, leading to the death of his friend and the killer remaining at large even till today. In the present day, he finds a mysterious walkie-talkie by chance, which connects him with detective Lee Jae Han (Cho Jin Woong) from the past. Working alongside Cha Soo Hyun (Kim Hye Soo), who used to be a rookie detective during Jae Han’s time, will the trio be able to crack cold cases from the past using the power of both foresight and hindsight?
Starring: Lee Je Hoon, Kim Hye Soo and Cho Jin Woong.