Tyler Wingo, a teenage boy, learns the awful news that his father, a soldier, was killed in action in Afghanistan. Then the extraordinary happens. Tyler receives a communication from his father after his supposed death. Tyler hires Sean and Michelle to solve the mystery surrounding his father. But their investigation quickly leads to deeper, more troubling questions. Could Tyler's father really still be alive? Could Tyler be the next target? Sean King and Michelle Maxwell return in the latest blockbuster thriller from New York Times bestselling author David Baldacci.