Eighty Americans locked inside Belko Industries’ high-rise corporate office in Bogotá, Colombia, are horrified when an unknown voice issues a command through the intercom system:kill two people in the next 30 minutes or more people will die. Pacifist Mike Pelk (John Gallagher, Jr.) & his girlfriend Leandra (Adria Arjona) try to convince their office mates to resist the order, but when the heads of four random co-workers explode and the anonymous voice directs the office workers to kill 30 more of their colleagues, cold-blooded COO Barry Norris (Tony Goldwyn) takes charge and violence escalates as the staff members turn on one another in a desperate attempt to survive.