Frances Neagley is a skilled private investigator working in Chicago, known for her determination and ability to handle dangerous situations. Her life takes a dark turn when she discovers that a close and beloved friend from her past has died in what appears to be a suspicious accident. Refusing to accept the official explanation, Neagley becomes determined to uncover the truth and bring those responsible to justice. Drawing on the skills and experience she gained from Jack Reacher and her years as a member of the 110 Special Investigators, she begins following a dangerous trail of clues. Her investigation soon exposes a powerful and threatening force, forcing Neagley to confront a deadly enemy and risk everything to uncover the truth.