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.

In the small town of Sand Rock, Arizona, an astronomer named John Putnam witnesses a meteorite crashing to Earth. He later discovers that the meteorite was actually an alien spacecraft and tries to convince his fellow citizens of an impending alien invasion. However, no one believes him except for his girlfriend and a few others. As the town becomes divided between those who believe in the existence of the aliens and those who don't, John must find a way to protect his loved ones and stop the invasion.