S01:É01 - S01:E01 - Episode 1
Genius Dr. Frost's first case: Actress Yoon Na claims someone is trying to kill her.
S01:É02 - S01:E02 - Episode 2
At 2 AM, a bloodied student is found dead. Detective Nam suspects Jin-wook, found in blackout, as the killer.
S01:É03 - S01:E03 - Episode 3
In a warehouse, two mutilated bodies are found. They were in starvation, linked to a woman.
S01:É04 - S01:E04 - Episode 4
A mysterious man stalks Professor Song-sun, causing growing anxiety and fear.
S01:É05 - S01:E05 - Episode 5
A poisoned homeless man and a hanged man are found dead, with more deaths following.
S01:É06 - S01:E06 - Episode 6
Seven years after losing her sibling Song-seol, Song-sun starts counseling a similar patient.
S01:É07 - S01:E07 - Episode 7
A famed human rights lawyer dies from poison, having called his young son before.
S01:É08 - S01:E08 - Episode 8
At a hotel, a man and woman clash, with her claiming assault and him denying it.
S01:É09 - S01:E09 - Episode 9
A mother confesses to murder, repeating "I smelled it," after her son's kidnapping.
S01:É10 - S01:E10 - Episode 10
Dr. Frost and Moon Sung-hyun's dark past is revealed. How will their tragic end unfold?