The President's only child is dying. Terrorists claim to have the cure.When a private plane whisks CDC epidemiologist Madeline Hamilton to Washington D.C. for an urgent medical symposium, she knows something significant is underway-but she doesn't expect to face the most disturbing medical mystery of her career. A debilitating neurological toxin has stricken the children of several political families, and one of them is the son of U.S. President...