Julian Marsh, an sucessful Broadway director, produces a new show, inspite of his poor health. The money comes from a rich old man, who is in love with the star of the show, Dorothy Brock. But she doesn't reply his love, because she is still in love with her old partner. At the night before the prmiere, Dorothy Brock breaks her ankle, and one of the chorus girls, Peggey Sawyer tries to take over her part.