Episode 1

Detective Taek-rok gets a prank call. The unknown caller says something he cannot ignore.

Episode 2

Taek-rok is framed for murder and gets interrogated. He delves into the past cases he undertook.

Episode 3

Taekrok realises the mistake he made in the past. The caller gives orders that cause Taekrok to become suspicious of everyone around him.

Episode 4

Taekrok entrusts the blackmailer's information to Jinhan then gets a clue about the blackmailer's identity.

Episode 5

Seong-a and Gyeong-chan decide to help Taek-rok, who realizes the blackmailer's target is not him.

Episode 6

Taek-rok chases a man who has a key to the truth. However, the man resists.

Episode 7

Episode 8

Episode 1

Taek-rok has conflicts with his team leader Yeon Ju-hyun. Seong-a struggles in a juvenile theft probe.

Episode 2

Seong-a gets injured, and Taek-rok tries to uncover the truth. Meanwhile, Gyeong-chan doubts Taek-rok.

Episode 3

Despite Taek-rok's caution, Seong-a pursues probing and ends up getting injured. Meanwhile, Taek-rok meets his old colleague Do-hyung.

Episode 4

Taek-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.

Episode 5

Taek-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.

Episode 6

Despite feeling helpless in the face of his enemies, Taek-rok finds motivation in the determination of those around him and continues his pursuit.

Episode 7

Taek-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.

Episode 8

After successfully apprehending some members of the crime organisation, Taek-rok closes in on the rest of the group.