Well-meaning and mild-mannered milkman Burleigh Sullivan (Kaye) meets Polly Pringle (Mayo), a beautiful, but out-of-work, singer, whilst on his rounds early in the morning. He tries to get her a job at the club where his sister Susie (Vera-Ellen) is performing, but gets the sack for his trouble. Whilst meeting Susie after the show, he sees her being molested by drunken boxer 'Speed' McFarlane and his bodyguard 'Spider'. In the fracas, Speed is knocked out and his manager, Gabby Sloan, is furious.