Ellie Mack is fifteen years old, she is the perfect daughter, the youngest of the family, her classmates adore her, her teachers admire her. But one day, during a summer vacation… she disappears. Her mother, Laurel Mack, refuses to believe the version that her daughter has left of her own free will and sets out to find her. Misfortune crumbles her world, her marriage ends and the clues to find her daughter are increasingly scarce. Ten years later, Laurel meets Floyd by chance and it seems that her life makes sense again, until she meets his daughters. And Poppy, the youngest, returns her to the starting point: where has her daughter gone? what was the reason for his disappearance? who is really Floyd? And why does Poppy remind him so much of Ellie?