Season 1
Kang Taeju, a former neurosurgeon who now serves as a hospital director struggling to face a dangerous criminal in order to save his wife, who was kidnapped before their divorce.
Episodes
Episode 1
Taeju asks his wife, Seyun, for a divorce. The next day, she vanishes and he gets an unknown call.
Episode 2
While at his in-laws' for help, Taeju gets another strange call. Seyun wakes up in a strange room.
Episode 3
Taeju escapes the police to save his wife. Seyun learns the meaning of the girl in the red hat.
Episode 4
Taeju breaks through a police dragnet, but a photo of a brutally murdered woman stops him cold.
Episode 5
The kidnapper agrees to the deal for 3 billion won. A car with its headlights on slowly emerges.
Episode 6
Taeju hides in a doctor's office away from detectives and meets an unexpected person.
Episode 7
Psychopath killer Noh Manhui reveals his true colors! Taeju and Seyun face his murderous rage.
Episode 8
Jeongsu's attempt to kill Gyeongae fails. Taeju recalls someone in the hospital linked to them both.
Episode 9
Noh Manhui remains at large as Taeju poses as Gyeongae’s doctor to find clues.
Episode 10
After a standoff, Taeju and Manhui uncover the truth, while Seyun learns about the nightmarish day.
Episode 11
Taeju finally uncovers the mastermind. That night, a fire alarm sends the hospital into chaos again.
Episode 12
Manhui and Chiung meet Taeju, and the three head to the care home where Gyeongae is.