美国某普通高中,上世纪70年代曾发生一起骇人听闻的惨案,名叫杰克(Billy Aaron Brown 饰)的男孩受到同学的排挤,结果被关在锅炉房中遇到意外活活烧死。时光流逝,当年的惨剧已渐渐被人遗忘,少数知情者也将其尘封在记忆深处,不愿提起。保罗(Preston Jones 饰)、迪安娜(Catherine Combs 饰)、丽莎(Maitland McConnell 饰)因各种原因遭到校长留校察看的处罚。傍晚,狂风大作,暴雨倾盆,孩子们被困在校园内。就在此时,一个模糊漆黑的亡灵开始在他们周围逡巡,恐怖与死亡不断出现,杰克的亡灵似乎被震耳的雷声惊醒。 孩子们试图逃脱,却发现自己已然陷入40年前的生死迷局之中……A group of high school students are sent to after-school Detention for unexplained reasons. There, the teenagers find themselves abandoned and locked in the classroom after their detention teacher leaves, then mysteriously disappears. With night slowly approaching, a thunder storm builds outside. The heavy rain and lightning causes a massive power failure throwing the school into total darkness. Then, strange, haunting images of Ghosts begin to appear in the school. The kids manage to break out of the classroom only to find that the old building has taken on a life of its own, keeping them trapped inside. As they struggle to escape, the teenagers learn about the death of a student back in the 1970's. Slowly, they unravel the history of this tragedy and that they are somehow connected to the student's macabre and untimely death. They will also soon find out that they are being held responsible for this horrific event of the past, and will pay for it with their lives!