Ray, a humble, comfortable analyst, barely survives a terrorist attack on his city. Forever changed, he quits his job to become a full-time father so he can give his son Billy the protection and attention he deserves. Ray moves with his wife Penny and Billy to a seemingly ideal town and for a time finds his fatherhood odyssey fulfilling.
But the plummeting bodies he saw the day of the attack haunt him in ways he finds hard to share, even with Penny. He battles the growing effects of isolation, migraines and a deeply rooted anger. He grapples with what it means to be a father.
On a seemingly harmless trip to a shopping mall, he apparently witnesses the aftermath of a carjacking gone horribly wrong and discovers just how strange and sinister everyday life can get. The vengeful, sadistic murderers threaten to kill his family if he talks. They stalk him with increasingly frightening phone calls and menacing drives past his house. At least Ray thinks so, because his intensifying migraines make him question what's real. The more the killers appear to come after him, the more Ray must test his vow to his son that he loves him more than life itself.