The Little Blue Devil was a musical comedy by Harold Atteridge and Harry Carroll that premiered on November 3, 1919 at the Central Theater on Broadway.
The show opens at the office of the fictional New York Inter-County Railroad.
Augustus Rollett hires a local dancer, "Little Blue Devil", to pretend she is his wife and flirt with his boss.
His actual wife finds out and uses the dancer to patch up her own marriage.
The second act takes place in the apartment of "Little Blue Devil".