Author and amateur astronomer John Putnam and schoolteacher Ellen Fields witness an enormous meteorite come down near a small town in Arizona. Putnam becomes a local object of scorn when, after examining the object up close, he announces that it is a spacecraft, and that it is inhabited...

Aliens crashland near a small desert town, strewing odd bluish-glowing rocks throughout the area. Townfolk notice something is amiss when temperatures begin to soar, water disappears, power goes down and people seem not to be themselves.