Soon after she return from a business trip to China, Beth Emhoff dies from what is a flu or some other type of infection. Her young son dies later the same day. Her husband Mitch however seems immune. Thus begins the spread of a deadly infection. For doctors and administrators at the U.S. Centers for Disease Control, several days pass before anyone realizes the extent or gravity of this new infection. They must first identify the type of virus in question and then find a means of combating it, a process that will likely take several months.
