Pursued by the Life Force in the shape of Ann Whitefield, revolutionist Jack Tanner flees by motorcar to the hills of Spain, and there dreams of his ancestor, don Juan Tenorio, in Hell, which is where refined spirits come when they are bored of Heaven. Shaw's answer to Nietzsche is that men are much too lazy and sensible to serve the force of evolution; if a superior mankind is to be produced, it is up to women. Disdaining to present a character who is a revolutionary, without giving him any ideas, Shaw provides a Revolutionist's Handbook and maxims by Jack Tanner to accompany the play.