Season 1
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.
01. Episode 1
Detective Taek-rok gets a prank call. The unknown caller says something he cannot ignore.
02. Episode 2
Taek-rok is framed for murder and gets interrogated. He delves into the past cases he undertook.
03. 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.
04. Episode 4
Taekrok entrusts the blackmailer's information to Jinhan then gets a clue about the blackmailer's identity.
05. Episode 5
Seong-a and Gyeong-chan decide to help Taek-rok, who realizes the blackmailer's target is not him.
06. Episode 6
Taek-rok chases a man who has a key to the truth. However, the man resists.
07. Episode 7
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08. Episode 8
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