此剧讲述在没有侧写师、精神病概念的年代，因为极恶的犯人连环出现，使得大韩民国陷入恐惧之中，为了追捕那些恶魔，需要倾听他们内心声音的侧写师们的犯罪推理故事。故事改编自权日勇和高纳穆创作的犯罪小说《追逐怪物的人》
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