Less than Evil

What an Ill-fated Relationship (1x1)

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Tae Seok is a detective who's tormented by a pang of guilt that he missed the culprit that murdered a high school girl named Yeo Wool in 2005. Now Tae Seok meets with a prosecutor, and he turns out to be a suspect who killed Yeo Wool in 2005. Meanwhile, a housewife gets abducted, Tae Seok starts to investigate.