The 15 remaining residents of a condemned apartment block are stalked by a sharp-shooting psychopath with a high-powered rifle in this tense urban thriller. One year ago, a 15-year-old boy was beaten to death in Tower Block 31. Terrified, the residents who witnessed the crime refuse to assist authorities in their investigation. Flash forward 12 months, and nearly everyone in the tower has been relocated as it's prepared for demolition. The only tenants left live on the top floor, and now they're sitting ducks for a sharp-eyed sniper who's set up booby-traps in every conceivable escape route. Even worse, his rifle has been outfitted with a silencer, making him virtually undetectable. Now, as the bullets start to fly and people start to die, those who survive the initial attack must figure out a means of outsmarting the trigger-happy maniac who's tracking their every move.