In 1920s New York, a struggling and idealistic young playwright David Shayne is forced to cast a mobster's talentless girlfriend in his latest drama in order to get it produced. Agreeing to this first compromise is the first step to Broadway's complete seduction of David, who neglects longtime girl friend Ellen. Meanwhile David puts up with Warner Purcell, the leading man who is a compulsive eater, Helen Sinclair, the grand dame who wants her part jazzed up, and Cheech, Olive's interfering hitman / bodyguard. Eventually, the playwright must decide whether art or life is more important.