Andrew McCarthy grows concerned for his family after he catches a young man, Zachary Denton, photographing his daughter, Grace McCarthy, and other children at a park. To his dismay, Zachary talks his way out of trouble when he's confronted by the police. He hopes that's the end of it. Then he finds Zachary at a diner and then at a grocery store. He knows their encounters aren't coincidences. And just as Andrew prepares to defend his family, Grace...