A documentary is shown on TV of group of teens who investigate the legendary forbidden zone, in which once took place a Demon infestation (see Demoni I). When finding a lifeless corps of a demon, one of the teens causes the resurrection it, and the demon makes it's way into the nearby world by TV-broadcast... An unlucky girl, having her birthday-party at that time, gets posessed by the demon while watching the documentary and soon the complete building in which she lives turns into a living nighmare....
 
http://www.imdb.com/title/tt0090930/