The plot introduces us to a psychologist who suggests to three couples that they engage in a group session, where they will have to analyse each other without her being present. In order to do so, she has left them a number of envelopes …
女大学生安吉拉(安娜·托伦特 Ana Torrent 饰)正在撰写一篇关于视听暴力的论文,她的传授在为她收集材料的时辰心脏病突发死亡。安吉拉感觉事有蹊跷,偷偷从案发明场拿走了传授死亡前正在看的一卷录像带。切玛(费雷·马丁内兹 Fele Martínez 饰)对暴力录像研究颇深,安吉拉带着录像带向他乞助。他告知安吉拉,其中录制的惨无人性的暴力行径…