影片根据美国历史中的一个真实故事所改编。讲述1966年7月14日,理查德冲进冲进一座南芝加哥的学校以9名学生护士作为人质,强暴并刺伤了年轻妇女,并进行了血腥屠杀……Richard Speck lives in the Dallas, Texas area, and is a seemingly quiet but string man. After divorcing his wife, and to escape the mental evaluation treatment a judge had ordered for him, he leaves Texas and moves to Chicago, where the hell will start.