Caitlin and Olivia are excited to finally be old enough to stay home alone. But when they fall asleep, someone turns the handle of the back door and nothing is ever the same again. When their parents return, they find Olivia’s bed empty. Their eldest daughter gone – until now. Ten years later, Olivia is back, and everyone is desperate to believe the nightmare is over. But Caitlin doesn’t trust the woman who claims to be her sister. Their memories of that night don’t match, and they are both hiding secrets that could tear their family apart.