Though Erin Baker has left the CIA, the people who once directed her career tap her to penetrate a medical aid group that may be hiding a sinister purpose. In Cuba, the organization’s head doctor is Emilio Diaz, Erin’s estranged father. Erin has the skills and a perfect cover to penetrate Castro’s shadow world. She also has another reason to take the assignment. An ex-mentor, previously on the case, has vanished somewhere in Cuba.