Dr Marissa Blumenthal is a recently qualified member of Atlantas renowned Centre for Disease Control, yet to put her skills to the test in the field. But when a mysterious viral outbreak occurs in Los Angeles, she has no time for self-doubt, finding herself plunged into a desperate race to contain a lethal virus for which there is no known cure. Then further outbreaks occur Dr Marissa Blumenthal is a recently qualified member of Atlantas renowned Centre for Disease Control, yet to put her skills to the test in the field. But when a mysterious viral outbreak occurs in Los Angeles, she has no time for self-doubt, finding herself plunged into a desperate race to contain a lethal virus for which there is no known cure. Then further outbreaks occur accross the States, all seemingly unconnected except for one bizarre similarity: the victims are always only the doctors and patiens of clinics offering low-cost medical care. In the face of her superiors fury and colleagues scepticism, Marissa begins to investigate, her evidnece pointing more and more at a ruthless and sinister organisation sworn to achieve a horrific goal no matter what the cost in human life - including Marissas.