After people in his town start turning up dead, a grumpy landlord is visited by a man who recounts an unsolved serial murder case from 30 years ago that may hold the clue to what is happening now.

導演柯貞年5年前執導植劇場《天黑請閉眼》，抱回金鐘最佳戲劇殊榮，擅長類型劇的她，這次將再次挑戰執導改編自小說家李桐豪懸疑推理作品《非殺人小說》。王小棣大讚柯貞年是擁有推理天分的導演，「其實原著篇幅偏短，本來一度想之後再作改編，但柯貞年導演說OK，並且改編得非常好，她是我少數看到從起步開始，就擁有推理天分的導演。」