Louis Winthorpe is a businessman who works for commodities brokerage firm of Duke and Duke owned by the brothers Mortimer and Randolph Duke. Now they bicker over the most trivial of matters and what they are bickering about is whether it's a person's environment or heredity that determines how well they will do in life. When Winthorpe bumps into Billy Ray Valentine, a street hustler and assumes he is trying to rob him, he has him arrested. Upon seeing how different the two men are, the brothers...