Overview
While unraveling an enigmatic murder mystery, a special force leader realizes this case is related to the incident that took 28 years ago in a small town.
Cast
Namkoong Min
Do Jung-woo
Kim Seol-hyun
Gong Hye-won
Lee Chung-ah
Jamie Layton
Yoon Sun-woo
Moon Jae-Woong
Kim Chang-wan
Gong Il-do
Shin Jae-whi
Lee Tae-soo
Kim Won-hae
Hwang Byeong-cheol
Lee Sin-young
Jang Ji Wan [Police]
Jung Dae-ro
Baek Hyun Su
An Si-ha
Jo Hyun-hee
Bae Hyun-kyung
Kang Yoon Sung
Baek Ji-won
Lee Taek-jo
Yoon Kyung-ho
Lee Ji-wook
Kim Ki-nam
PD Noh
Choi Dae-chul
Yoon Seok Pil [Police]
Kang Rae-yeon
Min Yu Ra [Police]
Choi Jin-ho
Son Min Ho
Kim Tae-woo
Oh Jung Hwan
Jeon Guk-hyang
Jeong Ok Sook [Hye Won's mother]
Jang Hyuk-jin
Jang Yong Shik [CEO]
More like this
Keywords
traumainvestigationmemory losstragic past
Seasons
Season 116 episodes2020
1
The Forewarned Murders
2020-11-30
64m8.5es731963
2The Smiles
2020-12-01
66m8.5es731964
3The Survivors
2020-12-07
67m8.5es731965
4The Fire
2020-12-08
68m8.5es731966
5The Safe
2020-12-14
68m8.5es731967
6The Mutants
2020-12-15
67m9.0es731968
7Jung Woo Being Chased
2020-12-21
60m8.5es731969
8Secret Lab
2020-12-22
59m9.0es731970
9Kids Adopted
2020-12-28
60m9.0es731971
10Jung Woo Following Kids
2020-12-29
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11New Warning
2021-01-04
60m8.0es731973
12The Reunion
2021-01-05
59m8.0es731974
13The Secret Lab
2021-01-11
59m8.5es731975
14Jung Woo in Secret Lab
2021-01-12
59m8.5es731976
15Reunion with Mother
2021-01-17
61m9.0es731977
16Mother and Son
2021-01-18
70m8.0es731978
Added: 5/14/2026Updated: 6/4/2026