There's a secret from my past.
A veteran detective who is about to retire unfolds a breathtaking psychological warfare with a mysterious man who follows his path while hiding his identity.
Producer: Ahn Da-eun, Lee Ji-hyeop, Kim Dae-ho
Writer: Son Jung-woo, Hwang Seol-heon
Director: Han Dong-hwa
Kim Taek-rok
Lee Seong-a
Son Gyeong-chan
Choi Do-hyung
Yeon Ju-hyun
Seo Gwang-su
Lee Young-ho
Baek Seong-il
Detective Taek-rok receives a threatening call and is falsely charged with murder. He desperately recalls the past to find out who the blackmailer is.
8 episodes
Detective Taek-rok gets a prank call. The unknown caller says something he cannot ignore.
Runtime: 58 minTaek-rok is framed for murder and gets interrogated. He delves into the past cases he undertook.
Runtime: 57 minTaekrok realises the mistake he made in the past. The caller gives orders that cause Taekrok to become suspicious of everyone around him.
Runtime: 56 minTaekrok entrusts the blackmailer's information to Jinhan then gets a clue about the blackmailer's identity.
Runtime: 56 minSeong-a and Gyeong-chan decide to help Taek-rok, who realizes the blackmailer's target is not him.
Runtime: 57 minTaek-rok chases a man who has a key to the truth. However, the man resists.
Runtime: 59 minThe final counterattack of homicide detective Taek-rok, who returns to pursue the blackmailer's friend's hidden mastermind.
8 episodes
Taek-rok has conflicts with his team leader Yeon Ju-hyun. Seong-a struggles in a juvenile theft probe.
Runtime: 55 minSeong-a gets injured, and Taek-rok tries to uncover the truth. Meanwhile, Gyeong-chan doubts Taek-rok.
Runtime: 52 minDespite Taek-rok's caution, Seong-a pursues probing and ends up getting injured. Meanwhile, Taek-rok meets his old colleague Do-hyung.
Runtime: 47 minTaek-rok reaches out to Lee Young-ho, who is jealous of Do-hyung. Taek-rok stops Seong-a from uncovering the arson case and discovering his secret.
Runtime: 51 minTaek-rok manages to identify an unknown skilled armed force with the help of Team Leader Han's testimony and devises a plan to lure them out.
Runtime: 51 minDespite feeling helpless in the face of his enemies, Taek-rok finds motivation in the determination of those around him and continues his pursuit.
Runtime: 47 minTaek-rok faces his past that he has been shunning and delves into the root of the problem. He is determined to protect his loved ones at all costs.
Runtime: 47 minAfter successfully apprehending some members of the crime organisation, Taek-rok closes in on the rest of the group.
Runtime: 60 min