Fifteen-year-old Ellie Mack was the perfect daughter. She was beloved by her parents, friends, and teachers. She and her boyfriend made a teenage golden couple. She was days away from an idyllic summer vacation, with her whole life ahead of her. And then she was gone. 

Now her mother, Laurel Mack, is trying to put her life back together. It's been 10 years since her daughter disappeared, seven years since her marriage ended, and only months since the last clue in Ellie's case was unearthed. So when she meets an unexpectedly charming man in a cafe, she is surprised at how quickly their flirtation develops into something deeper. Before she knows it, she's meeting Floyd's daughters - and his youngest, Poppy, takes her breath away. Looking at her is like looking at Ellie. And now the unanswered questions she has tried so hard to put to rest haunt her anew...as well as some new ones about Floyd and Poppy....