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.
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
No overview available.
Episode 8
No overview available.
