Darryl is a childlike man with a genius for inventing various gadgets out of junk. When he stumbles on a method to make his clothes bulletproof, he decides to use his skills to be the lowest budgeted superhero of all.

A comedy about a screenwriter (Wuhl) whose old movie script is read by a producer (Landau) and the search for financial backers begins. But it seems that each money source (Aiello, DeNiro, Wallach) has his own mistress that he wants put into the film. Gradually, the screenwriter is forced to make changes to his script to accommodate these backers until he finally sees no semblance of his original ideas in the writing.

At the University of Chicago, a research team that includes brilliant student machinist Eddie Kasalivich experiences a breakthrough: a stable form of fusion that may lead to a waste-free energy source. However, a private company wants to exploit the technology, so Kasalivich and physicist Dr. Lily Sinclair are framed for murder, and the fusion device is stolen. On the run from the FBI, they must recover the technology and exonerate themselves.