Eddie Lenahan (Richard Pryor) is faking it on many levels. He's been framed for a jewel-related crime, and to avoid jail, he pretends to be insane. He's then taken to a hospital and, during a blackout, he ends up pretending to be a doctor. With an oddball staff and criminals in the hospital, Lenahan has to do his best to stay sane while pretending to be insane.