#1 Episode 1
When a series of terrible murders ensues in a residential area, Cha Su-yeol is forced to seek help from Jeong I-sin, a serial killer from the past.
Release: 2025-09-05Grade
#2 Episode 2
The culprit has been arrested, but the victim’s whereabouts remain unknown. Su-yeol struggles to save a life as I-sin reveals her true intentions.
Release: 2025-09-06Grade
#3 Episode 3
I-shin offers assistance with the investigation, but it's unclear why she would help a cop. Su-yeol unravels the origins of I-shin's murderous instinct.
Release: 2025-09-12Grade
#4 Episode 4
The culprit begins to close in on Su-yeol's family. I-shin pressures Su-yeol to take action — but she happens to be the one threatening his family.
Release: 2025-09-13Grade
#5 Episode 5
Su-yeol finds I-shin in his home after she vanishes under police watch. The killer demands to speak to I-shin and gives her a hint about the plan.
Release: 2025-09-19Grade
#6 Episode 6
Shaken by recent events, Su-yeol attempts to confide in Lee Jung-yeon. During a tense call, I-shin manipulates the killer into exposing a crucial lead.
Release: 2025-09-20Grade
#7 Episode 7
As Jung-yeon copes with the truth of Su-yeol's past, the killer reveals their identity — and takes a hostage, forcing Su-yeol into a dangerous bargain.
Release: 2025-09-26Grade
#8 Episode 8
After a tense hostage exchange, I-shin confronts her protégé. Su-yeol makes a grim discovery about his family's fractured past.
Release: 2025-09-27Grade