As a Washington, D.C. psychiatrist unearths the origin of an alien epidemic, she also discovers her son might be the only way it can be stopped.

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.

When strange seeds drift to earth from space, mysterious pods begin to grow and invade San Francisco, California, where they replicate the residents into emotionless automatons one body at a time.

As a Washington, D.C. psychiatrist unearths the origin of an alien epidemic, she also discovers her son might be the only way it can be stopped.

Family moves to military base for the summer, but the soldiers are behaving even more strangely than usual. Is it a toxic spill as suggested or is it something more sinister?