When she is only six years old, Allegra Dixon's party-loving mother leaves without so much as a goodbye. Her father, an emotionally distant military officer, is also unable-- or unwilling-- to care for her. Sent to live like a ghost in her grandparents' joyless home, Allegra finds her only solace through an escape into books. Attending boarding school, life finally takes a turn when she meets a dashing young West Point cadet named Shep Williams. Soon their friendship blossoms into something more, and they fall deeply in love. After college, Allegra has established herself as a book editor and Shep is rising through the ranks of the military. But then Shep suddenly receives a posting to Afghanistan, and they decide to marry before he goes. Between his deployments, they cling to their brief and fraught stolen moments together. Each time he leaves, Shep promises the separations will soon come to an end. But soon Allegra realizes that the horrors of war have begun to change her husband into a man she no longer recognizes. The trauma he has experienced proves to be too harrowing, and Allegra will find herself feeling utterly alone again just when she thought she'd finally found happiness.