Dr. Thea Sperelakis is a brilliant medical mind working with Doctors Without Borders in Africa. But her rewarding life is turned upside - down when her father is severely injured by a hit-and-run driver, and she is forced to return home to Boston. As Thea uncovers the facts surrounding the disaster, it seems more and more to be no accident. Michael Palmer has created a cat-and-mouse game where one woman must confront a conspiracy of doctors to uncover an evil practice that touches every single person who has ever had a medical test.