Jeff Carter has put an end to the town's delinquency with a boys' club. Young hoodlum Danny shows up and influences teenagers Doris, Willy and Leo. They hang out at a juke joint where Eve (one of Marilyn's first bit parts) works. When Jeff tries to stop a robbery planned by Danny, he is killed and Danny goes on trial.

Katharine Hilliard, mousy dean of a stuffy music school, meets and is insulted by swing band leader Barry Clayton on a train. To "show" him she takes a friend's advice, removes her glasses, and puts on a designer gown. Naturally, she becomes gorgeous. Soon, both Barry and crooner Jimmy Hale are after her, and she finds herself in the midst of triangles and misunderstandings.