You're all alone in a deserted city. You walk down an empty street, yearning for the sight of one living face--one moving figure. Then you see a man on a corner and you know your terror has only begun.
It began when a pedestrian got hit by a cab in New York City. No doubt it was the only motor mishap in the history of creation that reached out among the stars--for far out in space a signal was registered: Something has gone wrong....for the doctors discovered their accident patient had two hearts. It was the beginning of the discovery that the Earth had been invaded by 10 such creatures from Outer Space.