Taeju asks his wife, Seyun, for a divorce. The next day, she vanishes and he gets an unknown call.

While at his in-laws' for help, Taeju gets another strange call. Seyun wakes up in a strange room.

Taeju escapes the police to save his wife. Seyun learns the meaning of the girl in the red hat.

Taeju breaks through a police dragnet, but a photo of a brutally murdered woman stops him cold.

The kidnapper agrees to the deal for 3 billion won. A car with its headlights on slowly emerges.

Taeju hides in a doctor's office away from detectives and meets an unexpected person.

Psychopath killer Noh Manhui reveals his true colors! Taeju and Seyun face his murderous rage.

Jeongsu's attempt to kill Gyeongae fails. Taeju recalls someone in the hospital linked to them both.

Noh Manhui remains at large as Taeju poses as Gyeongae’s doctor to find clues.

After a standoff, Taeju and Manhui uncover the truth, while Seyun learns about the nightmarish day.

Taeju finally uncovers the mastermind. That night, a fire alarm sends the hospital into chaos again.

Manhui and Chiung meet Taeju, and the three head to the care home where Gyeongae is.