. .Five years ago, three-year-old Dillon disappeared. For his father Harry - who left him alone for ten crucial minutes - it was an unforgivable lapse. Yet Dillon's mother Robyn has never blamed her husband: her own secret guilt is burden enough.Now they're trying to move on, returning home to Dublin to make a fresh start.But their lives are turned upside down the day Harry sees an eight-year-old boy in the crowd. A boy Harry is convinced is Dillon. But the boy vanishes before he can do anything about it.What Harry thought he saw quickly plunges their marriage into a spiral of crazed obsession and broken trust, uncovering deceits and shameful secrets. Everything Robyn and Harry ever believed in one another is cast into doubt.And at the centre of it all is the boy that never was . . .

    It's a cruel mistake; her son left for college a year ago, and Kelly has never felt so alone. The receptionist quickly apologizes: there's another mother in town named Kelly Medina, and she must have gotten their numbers switched.But Kelly can't stop thinking about the woman who shares her name. Lives in her same town. Has a son she can still hold, and her whole life ahead of her. She can't help looking for her: at the grocery store, at the gym, on social media. When Kelly just happens to bump into the single mother outside that pediatrician's office, it's simple curiosity getting the better of her.Their unlikely friendship brings Kelly a renewed sense of purpose, taking care of this young woman and her adorable baby boy. But that friendship quickly turns to obsession, and when one Kelly disappears, well, the other one may know why.