Seasons & episodes

S1 · E1Episode 1 2025-09-05 · 60 min＋

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.

S1 · E2Episode 2 2025-09-06 · 61 min＋

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.

S1 · E3Episode 3 2025-09-12 · 61 min＋

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.

S1 · E4Episode 4 2025-09-13 · 60 min＋

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.

S1 · E5Episode 5 2025-09-19 · 60 min＋

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.

S1 · E6Episode 6 2025-09-20 · 60 min＋

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.

S1 · E7Episode 7 2025-09-26 · 60 min＋

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.

S1 · E8Episode 8 2025-09-27 · 60 min＋

After a tense hostage exchange, I-shin confronts her protégé. Su-yeol makes a grim discovery about his family's fractured past.