当茉莉十六岁那一年是她一生恐怖惊魂的开始,一场残忍的命案,她失去朋友,也失去一切,幸免于难不代表活下来,谁是恐怖杀人狂,没人知道竟是开膛手杰克,某夏日,学生聚会中,恐怖杀人狂再度出现,又展开骇人残酷,惊心动魄的疯狂杀戮……A massacre survivor (A.J. Cook) studies serial killers under a famous expert (Bruce Payne), but her classmates soon start dying at the hands of a Jack the Ripper copycat.