Before going on vacation, selfinvolved psychiatrist Dr. Leo Marvin gets the misfortune of carrying to a new patient: Bob Wiley. Marvin is followed by an exemplar of neediness and a compendium of phobias, Bob into his family's country house. Dr. Marvin attempts for him to leave. The trouble is, Bob is loved by everyone. As his oblivious man makes himself at home, Dr. Marvin loses his professional composure and, so long, might be prepared for the loony bin himself.