Mallory's life turns upside-down after her young son, Billy, is drawn to Samantha, a strange woman who whispers to him at the local climbing gym. Billy refuses to reveal what she said, and now he’s acting up, Samantha is spying on her, and her husband, Reese, is behaving like he is hiding a secret from her. Little does Mallory know, because of memory loss, that she kidnapped Billy from his mother years ago.