Hollywood. 1955. Faced with two inexperienced actors, a film director encourages the leading lady and leading man to fall in love in real life so as to provide the heat needed for the inner film's romance, which enrages the actress' possessive gangster boyfriend, who happens to be the film's financier.

A college teacher brings the little creatures back to his campus, where they proceed to terrorize the faculty and students.

When the teenagers in a small Illinois town start getting murdered, the police chief makes a connection to the mysterious scientific experiments being done at the local university and must stop them before his own son is dragged into the deadly scheme.