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.

Hoeru discovers that the Prime Minister of Japan, Tokonatsu Atami, is also one of the ring bearers, who can transform into Don Momotaro. While thinking on how to defeat him,…