美国一所普通高中普通的一日,逃课未果的John(John Robinson),在父亲的逼迫下回到校园;喜欢摄影的Elias(Elias McConnell),在校园内外拍过一些人物和风景后,来到学校暗房冲洗照片;新交了女朋友的Jordan,正被与他有过关系的女孩纷纷议论着;被人冷落情绪异常低落的Michelle,来到学校图书馆帮助做工…… 校园高墙之外,时常受人欺负的“患难兄弟”Eric(Eric Deulen)和Alex(Alex Frost)正在家里午睡,他们对纳粹形象和暴力游戏非常迷恋,曾在互联网上订购了枪支。午睡过后,两人进行一番简单的策划,身穿美军野战装、手持冲锋枪走进校园,开始大开杀戒。A day in the lives of a group of average teenage high school students. The film follows every character and shows their daily routines. However two of the students plan to do something that the student body won't forget.