When fifteen-year-old American Hailey Portman goes missing in Switzerland, her desperate parents seek the help of their neighbor, Finn Harrington, a seemingly quiet historian rumored to be a former spy. Sensing the story runs deeper than anyone yet knows, Finn reluctantly agrees to make some enquiries. He has little to go on other than his instincts, and his instincts have been wrong in the past—sometimes spectacularly wrong. But he gets involved anyway, never imagining that Hailey’s disappearance might be linked to the tragic events that ended his career six years earlier, drawing him back into a deadly world that has neither forgiven nor forgotten.