This film chronicles the friendship of songwriting duo Bert Kalmar and Harry Ruby . Bert is a vaudeville dancer who moonlights as a magician. His assistant, Harry, makes a disastrous mistake at a magic show, and their partnership ends. Later, when Bert hurts his leg and can no longer dance, he tries his hand at writing musical numbers. After hearing a friend play a catchy tune, Bert asks to meet the man who composed the song -- leading him right back to Harry.