Queen Mantis

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. (Source: Netflix)

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. (Source: Netflix)

I Sin offers assistance with the investigation, but it's unclear why she would help a cop. Su Yeol unravels the origins of I Sin's murderous instinct. (Source: Netflix)

The culprit begins to close in on Su Yeol's family. I Sin pressures Su Yeol to take action — but she happens to be the one threatening his family. (Source: Netflix)

Su Yeol finds I Sin in his home after she vanishes under police watch. The killer demands to speak to I Sin and gives her a hint about the plan. (Source: Netflix)

Shaken by recent events, Su Yeol attempts to confide in Lee Jung Yeon. During a tense call, I Sin manipulates the killer into exposing a crucial lead. (Source: Netflix)

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. (Source: Netflix)

After a tense hostage exchange, I Sin confronts her protégé. Su Yeol makes a grim discovery about his family's fractured past. (Source: Netflix)