Season 1
8 episodes · Sep 5, 2025
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S1E1Episode 1
Sep 5, 202560mWhen 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.
S1E2Episode 2
Sep 6, 202561mThe 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.
S1E3Episode 3
Sep 12, 202561mI-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.
S1E4Episode 4
Sep 13, 202560mThe 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.
S1E5Episode 5
Sep 19, 202560mSu-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.
S1E6Episode 6
Sep 20, 202560mShaken 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.
S1E7Episode 7
Sep 26, 202560mAs 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.
S1E8Episode 8
Sep 27, 202560mAfter a tense hostage exchange, I-shin confronts her protégé. Su-yeol makes a grim discovery about his family's fractured past.