Ex-military policeman Jack Reacher is enjoying a life of anonymity in Key West when a private detective named Costello comes around with prying questions. Reacher conceals his identity, but is no less annoyed by the situation. Even more troublesome, Costello turns up dead soon after with his fingertips sliced off. Left with several questions, Reacher hits the road to find some answers. Answers that will lead back to New York, to an alluring, but untrustworthy woman, and to his own past.