A mysterious, deadly disease is sweeping the world, and everything points toward a terrorist plot against the United States. Can a vaccine be found before the illness sweeps around the globe?
When Dr. James Schriver attends a conference in the Virgin Islands, he is introduced to Laleh Bazargan, an Iranian infectious disease physician who is the keynote speaker. She presents evidence that a mutation of the influenza virus is the disease's source.
Jim and Laleh develop an attraction for each other as they search for answers to the disease, but their quest for truth wrenches them apart as the turmoil in the United States quickly escalates to include Iran, Turkmenistan, Israel, and Afganistan.
Driven by paradoxical love, grief, and fear, Jim and Laleh face common enemies in a race for their lives and millions of others worldwide.