简介：一对疲惫不堪的富翁夫妇跟他们成年的儿子一起在他们的城堡里看色情电影，儿子很暴躁，所以他们到城镇里去看杂技表演，节目中那个蛮勇的女人跟他们在电影里看见的女人非常像，于是丈夫邀请她去他们城堡作客，家庭内的紧张似乎在加剧，她留下来过夜，她在城堡里的24小时内，城堡的三个居民都对她产生幻觉，她依次问他们，“谁有枪？”访问结束前会发生暴力吗？

一名巴黎舞厅女歌手尼可尔被一个精神错乱的男人秘密跟踪，而他很可能就是杀害钻石大盗尼可尔父亲的凶手。在朋友罗伯特的帮助下，她希望到英国乡村旅行，企图摆脱这个跟踪者。但是这位无情的跟踪者并不轻易放弃，很快就发生了更多的谋杀案……

一个男人被一群同流合污的贪官们出卖了，他背锅坐了15年牢，所以他回来复仇要找到1955年的证据

Highly unusual, powerful and tragic horror film, which shows ignorance and superstitions of Italian province. A girl is believed to be possessed by the devil and the cause of the tragic events that occur in the small town where she lives. Israeli actress Daliah Lavi (who the same year plays in Mario Bava's "Whip and the Body") portrays young, ignorant country girl named Purificazione, who herself convinced that she is really responsible for all misfortunes. Director Rondi was acclaimed Italian screenwriter, who works with many great Italian directors, including Fellini, Rosselini, De Sica. "Il Demonio" was based on true facts.