It is a day in Los Angeles like any other. There is much traffic, and people are touring the city. There is a big turn of events when a dirty bomb resounds loudly. This bomb unleashes some type of toxic acid; the public is put in a terrible situation. People remain stuck in their cars, and people in their homes are required to stay there.
A team with the experience for this situation must try and save the world. This does not look promising. As the story goes on, it only gets worse. There are no answers for the people of the city.