Headed for vacation in Key West, intern Doctor Dewitt Houston and his brother Jesse happen upon a terrible scene: an explosion of a poison-filled tanker truck. Dewitt saves one person but does not come out of the maelstrom unscathed. Some years pass and Dewitt teaches at a medical school in Atlanta. Among his wet-behind-the-ears med students is portly and garrulous David, bright but lacking in common sense, as becomes obvious. When Dewitt travels to the nation's capital to visit Jesse, now...