Fifteen-year-old Ellie Mack was studying for her exams and excited about a summer of freedom and her building relationship with her boyfriend when she disappeared. With only limited clues, police were convinced she ran away.

A decade after her daughter’s disappearance, Laurel Mack is finding life is passing her by. Her ex-husband has remarried. Her relationship with her remaining daughter is estranged. Her son and his wife barely speak to her.

A chance encounter with a man offers her a new chance at life. Floyd is attractive, funny, and sweet. All is going well until she meets his younger daughter, Poppy. The resemblance to Ellie is uncanny, even though Poppy wouldn’t even have been born when Ellie disappeared.

When she discovers that Poppy’s mother was Ellie’s tutor before she disappeared, the coincidences are overwhelming. Laurel becomes consumed with finding out what happened to her missing daughter and uncovers the horrifying truth layer by layer.