A group of wayward teens at a wilderness boot camp must fight for their lives against the attacks of a ruthless blood-sucking alien. The attacks begin after they discover a strange "orb" in the middle of the desert. With no communication, and nowhere to hide, they realize their only chance for survival is to fight.

Mary moves back to her suburban hometown to find that the suburbs are scarier in more ways than she ever remembered.

911事件后的几天，含有致命炭疽芽胞的信件在美国引发了恐慌和悲剧。本纪录片回顾了联邦调查局随即对此事件展开的调查。