Ellie Mack was the perfect daughter: 15 years old, the youngest of three children. Loved by her parents, friends, and teachers, she was also one half of a teenage golden couple. Ellie was just a few days away from an idyllic summer vacation after exams.

And then she was gone.

Now her mother, Laurel Mack, is trying to put her life back together. It has been ten years since her daughter disappeared, seven years since her marriage ended, and only a few months since the last clue in Ellie's case was unearthed. So when she unexpectedly meets an attractive man in a café, no one is more surprised than Laurel that their affair quickly develops into something deeper. Before she knew it, she had met Floyd's daughters, and his youngest, Poppy, caught Laurel off guard.

For to see Poppy is like seeing Ellie. And now, the unanswered questions she has been trying so hard to put to rest begin to haunt Laurel anew. Where did Ellie go? Did she really run away from home, as the police have long suspected, or was there a more sinister reason? Who exactly is Floyd? And why does his daughter intuitively remind Laurel of her own disappearance?