Mu-gak snoops in Yeom Mi’s office and learns why she took him off the case. The Barcode Killer visits Cho-rim’s dad to find out who the witness is.

Cho-rim manages to escape from the Barcode killer, who steals a photo from her father’s home address in order to identify her.

Cho-rim leads Mu-gak to a body in the river and is later followed. Mu-gak reveals to Cho-rim how he lost his sense of pain, taste and smell.

A new barcoded body is found, but Lt. Yeom Mi suspects it’s a copycat killer’s work. An accidental injury brings Cho-rim to Dr. Cheon Baek-gyeong.

When a strangled chef falls off a roof, Kwon Jae-hui becomes a suspect, but a scent leads Cho-rim elsewhere. Mu-gak learns why Baek-gyeong went to Jeju.

A confession letter is written and stored. Ju Ma-ri’s journals are discovered. Mu-gak figures out what the barcodes on the victims’ bodies signify.

The Barcode Killer places the next body so it will be found and covers his tracks. Cho-rim’s friend Ma Ae-ri is accused of stealing from her employer.

Choi Mu-gak agrees to help Oh Cho-rim with her comedy skit in exchange for assistance on a case that could earn him a spot in the Violent Crimes Unit.

After her parents are murdered, a young woman awakens from a coma with total amnesia, and crosses paths with a cop who suffered a loss of his own.

Why on earth did they kiss? Soo-jung is embarrassed by what happened last night. She believes that Joo-yeon will confess or explain, but Joo-yeon doesn’t say anything. Soo-jung, who is…

Liv is devastated by her boyfriend Zach’s mysterious death in a gym fire, but evidence of gunpowder suggests foul play. As detectives investigate, Liv and her friends struggle with guilt…

After her parents are murdered, a young woman awakens from a coma with total amnesia, and crosses paths with a cop who suffered a loss of his own.

Choi Mu-gak agrees to help Oh Cho-rim with her comedy skit in exchange for assistance on a case that could earn him a spot in the Violent Crimes Unit.

Cho-rim leads Mu-gak to a body in the river and is later followed. Mu-gak reveals to Cho-rim how he lost his sense of pain, taste and smell.

A new barcoded body is found, but Lt. Yeom Mi suspects it’s a copycat killer’s work. An accidental injury brings Cho-rim to Dr. Cheon Baek-gyeong.

When a strangled chef falls off a roof, Kwon Jae-hui becomes a suspect, but a scent leads Cho-rim elsewhere. Mu-gak learns why Baek-gyeong went to Jeju.

A confession letter is written and stored. Ju Ma-ri’s journals are discovered. Mu-gak figures out what the barcodes on the victims’ bodies signify.

The Barcode Killer places the next body so it will be found and covers his tracks. Cho-rim’s friend Ma Ae-ri is accused of stealing from her employer.