The Girl Who Sees Smells - Season 1

After a barcode-murder case takes his younger sister, Officer Choi Mu-gak is left unable to taste, smell, or feel pain. His search for the serial killer leads him to Oh Cho-rim, the only witness to the crime, who has an unusual form of synesthesia: she can see smells. As their shared tragedy brings them together, her rare ability becomes a vital clue in tracking the killer.