The Factory of the Iberian Society of nitrogen (NO) or Nitrastur Factory is a former industrial complex located in the Asturian town of Langreo (Spain), and popularly known as Nitrogen. In this factory, which has nearly twenty years abandoned ammonium sulfate was made. completely empty buildings, inhabited by wildlife and by someone else.
Alli is a person hiding in a gas mask. This is a very dangerous individual who carries the virus "dengue" and threatens the planet's population. This virus causes similar to those of flu but causes some complications ending in death symptoms.