Lee Jehoon
Park Hae-yeong
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Crime · Drama · Fantasy
A cold-case profiler in 2015 and a detective in 1989 work together to solve a series of related murders spanning three decades using a special walkie-talkie to communicate with each other.
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Park Hae-yeong
Cha Soo-hyeon
Lee Jae-han
Kim Gye-cheol
Ahn Chi-soo
Kim Hae-chul (Detective)
Jang Young-chul
Oh Gyung-tae
Jin-Woo
Lee Chun-goo
Lee Chan Goo [Bus driver]
Yeo Jin's father
Shin Da-hye
Yoon Soo-ah
Yoo Seung-yeon
Jang Tae-Jin
Kim Won Kyeong
Detective