A woman born in the sea of Naples in 1950 searches for happiness over the long summers of her youth, falling in love with her home city and its many memorable characters.

Washington, D.C. psychologist Carol Bennell and her colleague Dr. Ben Driscoll are the only two people on Earth who are aware of an epidemic running rampant through the city. They discover an alien virus aboard a crashed space shuttle that transforms anyone who comes into contact with it into unfeeling drones while they sleep. Carol realizes her son holds the key to stopping the spread of the plague and she races to find him before it is too late.

Abby Quinn is eagerly awaiting childbirth but is haunted by dreams where she suffers a miscarriage. When she decides to rent a room to a mysterious stranger, she realizes a chain of events that will unleash the end of humanity.