With the subtleness of the invisible and the potential deadliness greater than a bomb, disease can the most dangerous threat of all. When such outbreaks occur, an elite team of medical investigators from the National Institutes of Health lead by Dr. Stephen Connor is on the case to get to the bottom of the danger anywhere in the country. However, the medical situation is only part of the problem as their public relations officer simultaneously attempts to control to prevent public panic and complicate things still more.