My fair lady : a musical play in two acts based on Pygmalion by Bernard Shaw

When overbearing Professor Higgins stumbles on flower girl, Eliza Doolittle, in Covent Garden he recognizes that her hideous vowels and forgotten consonants are all that separate her from the upper classes. Higgins wagers that he can pass her off as a Duchess in a matter of weeks. But what will become of Eliza when the bet is over?