Jack Reacher is not pleased when Costello, a private detective, comes nosing around asking questions about him. Determined to keep out of trouble, Reacher conceals his identity. But when he finds Costello dead with his fingertips sliced off, he realizes it is time to move on - and move on fast. Yet two questions worry him: who was Costello's employer, the mysterious Mrs Jacobs? And why is she determined to find Reacher?.