Jonathan Winters, 85-year-old comic genius, is a gifted painter. He dreams of having his paintings hang in the Museum of Modern Art. When Jonathan's art exhibitions in Beverly Hills and Las Vegas fail, a discouraged Jonathan is ready to abandon his dream. The filmmakers decide to help by hunting down a famous critic and show him Jonathan's paintings. He believes Jonathan is "the missing link between Miro and Dali" and convinces the Museum of Modern Art to give Jonathan a show-but only if he paints three new paintings. Jonathan launches into a painting frenzy but disaster strikes when his favorite painting is stolen, causing him to lose his sense of humor (He claims that a witch doctor trapped him in a bathroom and sucked the humor from his body.) Without his sense of humor Jonathan cannot paint. About to lose his big show, Jonathan tries everything to get back his humor.