After enduring various indignities by the human population in town, including getting beaten up by the fish market owner and forced to eat hot mustard by a customer in a restaurant, Felix finally breaks when he hears the mayor give a speech vowing to drive all cats out of town.

An Englishman (Leslie Howard) who has been studying painting in Paris for four years, is advised by his art teacher that his work is mediocre and second-rate, and that he lacks promise. So he returns to London, England to take up studies to become a medical doctor, but his older age and introspection make it difficult for him to keep up in his scholastic work. In England, he becomes infatuated - and then obsessed by a blonde, lower-class, slatternly and vulgar, Cockney-accented, illiterate tearoom waitress named Mildred Rogers (Bette Davis)