While Professor Sachs and his assistants conduct an experiment for a better and more efficient energy source, an unexpected result occurs. A probe is sent into a vacuum chamber to investigate what happened and then transmit data to the laboratory. A change occurs, which affects everyone and causes a small town in Missouri to be invaded by an alien being. For nourishment, the creature must survive by absorbing energy from cellular structures and other sources, while searching for the purpose of its existence. The Sheriff, Doctors, and the Professor must destroy the intruder, before all energy signatures are absorbed and everything ceases to exist. With any decision, negative consequences may occur, which may affect everyone.