Philip and Cynthia Grey are a pair of recently-wed Bostonians, and Cynthia is properly Back-Bay no-action quiet and dowdy, and Philip resigns himself to the quietness (no action) regularity of their home. But then along comes a blonde, Peggy Nash, who adds some action to Philip's life. Cynthia is somewhat upset at this turn of events, and decides to go to Paris--the Wickedest City in the World--and get a quiet divorce. Cynthia soon finds out that Paris is a really gay city, especially after Henri de Briac shows up and offers to be her guide to the delights of Paris (primarily him). Cynthia quickly sheds some of her dowdy clothes and ways and starts having what was once quaintly described as a gay old time. Philip then shows up in Paris, deciding that he wants Cynthia back as his wife. Peggy shows up right behind him, and soon it's up to Henri to make the pairing arrangements for the foursome.