When the US gov't tests a highly secret nerve gas on the residents of Hagerstown, MD the side effects bring down a world of horrors for 6 strangers trapped inside a movie theater.When the US gov't tests a highly secret nerve gas on the residents of Hagerstown, MD the side effects bring down a world of horrors for 6 strangers trapped inside a movie theater.When the US gov't tests a highly secret nerve gas on the residents of Hagerstown, MD the side effects bring down a world of horrors for 6 strangers trapped inside a movie theater.