ADMIRABLE BASHVILLE is based upon Shaw's own highly unsuccessful 1886 novel, "Cashel Byron's Profession," which follows a world champion prizefighter (Bobb) who tries to woo wealthy aristocrat Lydia Carew (Armbruster) without revealing his illegal profession (or the truth about his theatrical mater). Meanwhile, she also has a secret admirer in her formidable footman: the handsome, smart, efficient and ever-watchful Bashville (McGillin).
The novelty of this particular play is that Shaw wrote it as a parody of Shakespeare. The entire play is, in fact, written in blank verse.
As the characters are all "contemporary" this makes for unique comic lunacy in Shaw's canon.