The country is threatened by a mysterious epidemic that alters human behaviour. When Carol (Nicole Kidman), a Washington DC psychiatrist, unearths that the origins of the plague are extraterrestrial, she attempts to warn others of her discovery. With the help of her colleague and friend Ben (Daniel Craig), Carol examines further mysterious details of the conspiracy. She soon comes to the realization that her own son might hold the key to stopping an alien invasion and must fight to protect him.