Frances Neagley is a private investigator in Chicago and former military protégé of Jack Reacher in the Army's 110th Special Investigations Unit. When she learns that a beloved friend from her past has been killed in a suspicious accident, she becomes hell-bent on justice. Using everything she's learned from Jack Reacher and her time as a member of the 110 Special Investigators, Neagley puts herself on a dangerous path to uncover a menacing evil.