The President's son is dying. Terrorists claim to have the only 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 Anna Moreland.With the lives of children on the line, Madeline assembles a team of medical experts. The investigation takes a horrifying turn when she starts receiving communications from the terrorists, who want to engage in a deadly political game. Desperate to find the perpetrators and a cure, the White House recruits FBI antiterror specialist Quinn Traynor to run a parallel investigation. As the teenagers start dying and the answers seem no closer, Madeline and Quinn fight to prevail before President Moreland is forced to make an impossible choice: give in to the terrorists' demands or let her only child succumb to an agonizing death.